Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedee6aeba741049…

MALICIOUS

PDF

95.6 KB Created: 2021-07-27 12:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 83cf4ba3f9748c9e144c9e5299ee09a1 SHA-1: a2083b19363cdedc4df08921a71db10c049aab09 SHA-256: dedee6aeba74104915cb5157787efc0c767732c66752862958b4e90ddc1f0b7d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The embedded URLs are likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfcf21db7b---segemejugofaxakovaja.pdf In PDF document text
    • http://www.fonfe.com/uploads/files/sawopomilosolunug.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a989cf296b0---wuzaxebumabaxever.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/g7e9l5binoetk3ou2q3441bhns/26906452935.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a8d88f339---51519015749.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/lifebuxebujemimemosine.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/97012999215.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c52d22b61bbdbe16ef2abc1280753e62/kexiwimoferawaxisami.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2lb8r3kqh8c0v7t5ucgvi1st11/minolebi.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/33879801122.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/fididoj.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-6/20210606145543220308.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/wunopunuvipitelanunimoti.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/96767871252.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97e7e0c58---nititapodipape.pdfIn PDF document text
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/sulebonuzut.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/uugngt4alfptstc6fh5vhlflcu/mekolijosifawajapa.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/85259534662.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f83e8d61---xawapofiref.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abf568bae61---51370216413.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/idj1275bi7gmridp1bsk0llf77/81492445588.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/7fc5b6811d7ce22f3e15d88568864c7c/45277034109.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/6hsaboamuc2gs9ef9ti1nn3597/balofudaf.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/210fbf37462e8d76d4c8b1b9f2389aa8/82031849717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=borderlands+3+fl4k+guidePDF 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_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 17204 bytes
SHA-256: 2b9b8b237db2ea94ba7564b326cab46e312b8b0420c287095b8d87f314846a38
font_01_sfnt_off00013cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 10928 bytes
SHA-256: 6e57765afd77f79100b1997cef078b89acf985212b969b3d6fe244ec4e154c62
font_02_sfnt_off00015644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15644 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1