Malicious PDF — malware analysis report

Static analysis result for SHA-256 380e766969621d43…

MALICIOUS

PDF

81.0 KB Created: 2021-06-28 03:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29609b2b30e4bd57470396166bbe6216 SHA-1: d694e75688206bbe80adcc2b099ddaa60244c22e SHA-256: 380e766969621d43c266370c3a732515063e7174e407a5fa7d7ed33593ca3d00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to multiple distinct hosts, many of which are identified as compromised WordPress installations. This structure is indicative of a phishing or malware distribution campaign, where users are lured to malicious content via seemingly legitimate but compromised sites. The ClamAV detection and ML classifier further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/61b76255541d59ae98d1f0eb8a9ec547/fanefinuno.pdf
    • http://fecoil.com/userfiles/file/97129762915.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a09f3427b---57447604491.pdf
    • https://mangonebike.com/uploads/file/63970478427.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a68067086---raxowip.pdf
    • https://detmers-kontejner.hr/files/povotiwizubosedawekifaku.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/90824953280.pdf
    • https://etimes.mn/uploads/files/7628507001.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/e7837a58d8e511ed35440542119f577d/55675170851.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/de85cc1810624a2693d7ca347ff4283d/73498720169.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/5594484741d8298310535cf03b459e4d/98445906562.pdf
    • https://flardochform.se/userfiles/file/sojapawumukak.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01b5c068d---mefibukuwobu.pdf
    • http://panegovernance.com/ourprojects/chowki/UserFiles/file/vugaxarebom.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbdd97bbeb---wosarukupetidifigiwo.pdf
    • http://hesexpo.com/img/editor/image/file/55141288415.pdf
    • http://safeabortionnepal.com/userfiles/file/kefopulenitufirefol.pdf
    • http://zavalinka.by/var/upload/file/wodunakagonalupubikesuxu.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/v2grbhocgnjnnc3ksh2fdc03de/xipaloboxukukirina.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/3ab1lhvlt1kvc60d3c59aflqt6/sekemamuvag.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/6bgfbokhn3c4v63sdav9prgt5p/83850041573.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f640ece609208e8d15d342440e14b835/55832293083.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/905e4d52a425245d3ef074265f98768e/45976863081.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9820e905fd---zajevorasarofos.pdf
    • https://bandai-k.com/userfiles/file/82611489728.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+train+your+dragon+3+gomovies
    • 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_off0000d59e.bin
0133df3df5afdf078bd09dcaf6ac6ec10f5471ba48e7f5ec84f5435c719bbc35
pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 17872 bytes
font_01_sfnt_off0001048d.bin
8c4bd23617d5572861d3862db2bfa1dcf9f24b56d486f9b75d7763e148700ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 11072 bytes
font_02_sfnt_off00011e3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3A 16792 bytes