Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d7af3bf565e2a4…

MALICIOUS

PDF

85.0 KB Created: 2021-08-15 14:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bc3965e6e92e023950531c204991f64 SHA-1: 3c17b698b43522ba2d3c340e64fc0f97b3703469 SHA-256: 56d7af3bf565e2a4397baeb8cd570a1d200f6aa1c7358f10ca5de7654d4bd01a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is classified as malicious by ML models and ClamAV, and exhibits characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://journeywithmypet.com/ckfinder/userfiles/files/50940240316.pdf
    • https://gobelsprofil.com/upload/files/lotefatodavokazame.pdf
    • http://rudolphalexander.com/uploads/files/sasowiresefovezib.pdf
    • http://csc0512.com/userfiles/file/20210726091425_u97guj.pdf
    • http://geyikkimya.com/userfiles/upload/file/11392848806.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607880766311b---tubegikuxurexot.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2cfbaf7f3---83982360035.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/c626a3b84d88988de48a0a039ac13409/suwatamurilixadimutusisud.pdf
    • http://studiosimonepantaleo.it/userfiles/files/mikodizudedef.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/20da3a7c0d8eee1479d04de2d6ed1338/76479259122.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dd7d2b308---pafuxuxazufu.pdf
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/22474794249.pdf
    • http://thejosephinebryantfamily.com/clients/48776/File/dudesomusonekibem.pdf
    • http://fine-cottage.ru/userfiles/file/romamabivedowivifekifux.pdf
    • http://alarcon-v.com/editor_upload_image/file/8302231597.pdf
    • http://bakefruit.com/uploads//files/202108030451069187.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30916a2264---kojakubulojesuli.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef62678a7a---radobobufijomuwijav.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67e0b39da1---pajurunojuzetigimixita.pdf
    • http://vtvxm.vn/userfiles/file/29791753684.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908395ebbbb---26155880743.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a0b049787---lamapebamukujepukisijisuj.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a50c78cfa2f346483b120530f3fe6c69/vofine.pdf
    • http://saveursetsavoirs.fr/image/file/bexosif.pdf
    • http://bakefruit.com/uploads//files/202108030246176544.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=licencias+eset+nod32+antivirus+13.1.21.0+gratis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e359.bin
85c3e704188e479ae043dd8252cabb86e15e9396f4ab13332f20d76e17fb5b96
pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 18696 bytes
font_01_sfnt_off0001127c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 16792 bytes
font_02_sfnt_off00012a93.bin
768e90c61191fb691fce46c25a286926bb502ff3f28944cf4a49dbbabf74d826
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A93 11152 bytes