Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e14b673ea761dd2…

MALICIOUS

PDF

91.2 KB Created: 2021-07-26 09:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4faf6534a1b157586789be78445fbbac SHA-1: f8c7e29ce3a0ca489640d35c6d50a12d8619442c SHA-256: 2e14b673ea761dd29085db2826fdfda0bb6d9ee3abfed504412fd8b07378793f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicate a high probability of maliciousness. The document contains multiple links to external PDFs hosted on various compromised websites and disposable domains, suggesting a link farm designed to distribute malware. The presence of a 'download button' lure and a 'password-protected archive' heuristic indicates an attempt to trick the user into downloading and decrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://shipsupply.ru/userfiles/files/vegogulefugagikuwejep.pdf In PDF document text
    • https://airflow-skateboards.com/upload/file/57853909092.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/emeulmaof2vl2da8396emi0p9g/wezexuronupamir.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/tizumedo.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/61720449003.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609f98314e3f3---15576734506.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29301e4e4e---17075518365.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/61530970379.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/baluviset.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/q24kjk3ltom2092ddtmh6ouffn/rurulojalifezuzute.pdfIn PDF document text
    • https://actor-conseil.com/files/file/nedozevosowisuge.pdfIn PDF document text
    • http://caramelitos.sk/files/50005037317.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/010d2eb19a4aafdda5e6d2c53d494f08/20422080502.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7121aed028ec834038f154c85ad31173/sepanuxejujipuzezaja.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/o6ialduc9m6kou7kg83gp07536/fasezusudevefuf.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/32211682684.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/84876435879.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/5622357230.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/xenimusafu.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/wuxabeguvorugofi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de6d687d3c1---wudafiduvuwefexamifamexe.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c366adfcb92257d77c8d7035515ea1ca/navimegosipurasotes.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f30b1548737---wogij.pdfIn PDF document text
    • http://robedecreateur.com/img/files/88958619428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=adobe+audition+1.5+descargar+gratis+en+espa%C3%B1olPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 18144 bytes
SHA-256: 64d8ab2c43801fcd0737c772b54e689d5c8c21eb77a236ec5c6694ba32b1c8d2
font_01_sfnt_off000129a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BD 11368 bytes
SHA-256: e07363788c9e59b6b2fb471ce7c8c0c303a0857ded7ba6dbd8857e3634ddb963

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