Malicious PDF — malware analysis report

Static analysis result for SHA-256 d007513874a19bbd…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6da8b5875f66529dc6f35368e9b07163 SHA-1: 0222e4d631fb154e4f7aa1d9fdfda9e4606b9a87 SHA-256: d007513874a19bbdf9de1e15b66988894bb77b60c5317e77de1889d00a70953d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution campaign. It contains embedded JavaScript and numerous external links, including one pointing to an algorithmically generated URL, suggesting an attempt to redirect the user to malicious content or download further stages. The PDF's structure as a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://drafthe.ru/uplcv?utm_term=url+skins+virtual+droid PDF link annotation
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9e79f0969---nojodelave.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/15804821573.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/93907529037.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/43941204299.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/34484771047.pdfIn PDF document text
    • https://pepsima.biz/files/file/76371807270.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/53771363071.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/woxexotito.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/fezovotalogogoseveximuwol.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/33542040184.pdfIn PDF document text
    • http://polipack.ru/content/file/posel.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/kukagewem.pdfIn PDF document text
    • https://renetravel.ro/images/files/zevomixijukovuma.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/58717162333.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/860589732cf321db329cc0385919f612/67395517803.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/44180627163.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/kesaguralosadigesoratinu.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/11774587318.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/majenujujovonipanexuvow.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/29350719477.pdfIn PDF document text
    • http://vladekoservis.ru/files/mopegupagajabalodenuwopot.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/tedipiwoxezigibegosizelak.pdfIn PDF document text
    • http://makaroma.fr/upload/file/maminovidamosol.pdfIn PDF document text
    • 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_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 19276 bytes
SHA-256: d85d31b7044eac2360ca49115ed25b93397181358faf9d5c8c418f00ac0e42d4
font_01_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 10372 bytes
SHA-256: 8a654362475c2a3d01ed59994383ab4633a7c50b2f0e9c344afee07da3b1affe
font_02_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1