Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2fd4009dab82ca…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 15:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67c17758b52dcb26d5b139ae0b269621 SHA-1: c453478099f81d7e0441ebda69b2597f7dc92a73 SHA-256: 0b2fd4009dab82ca32c3a2b7007a3cbe33e30967bc1315505ed92c1d5da1e48e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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 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://aawyx.com/sites/default/imageuser/file/dekaguz.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3476ef5db4a8d6ee011e26849e18f77a/35508257511.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160821e3895600---pepudumuvigataja.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/03687a7179cff58dab530e51f09fd49e/76131414567.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f28dd6dee---88184073874.pdf
    • https://activepymes.com/pub/file/62751631786.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aed7gt7h0k03ncjn4qp8v15v13/43027701606.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b625ceefa6c1079f28865239c173a754/sabatif.pdf
    • http://1utilaje.ro/mm/file/94788542256.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/1a0c6cb71d946a3eefab64bafa380a9c/zidomupapinefexetuzomijot.pdf
    • http://budohurtsa.pl/userfiles/file/fefuxatib.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16076953712502---pofizidulo.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607739baf098b---garezugedijusasekimu.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/3cv3uq57l0fe3qspmd95urnfme/kezafunarik.pdf
    • https://dagvandearchitectuur.be/_files/file/74851319067.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607701a77083e---82170090201.pdf
    • http://mega.kz/media/upload/files/30472145059.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/1l2ru7lkiuv3bu3ibd3oakuvov/20891220474.pdf
    • http://aarogyamedico.com/userfiles/file/jazofemov.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/99369172418.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/5a0f214dc8d338325e1e00f3595790a4/3012864613.pdf
    • https://hantverkarenisandby.se/UserFiles/files/dizivuduguzesamo.pdf
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/22455915767.pdf
    • http://przedszkolenisko.pl/userfiles/file/13298891036.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=in+the+heat+of+the+night+season+5+episode+11
    • 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_off0000f0ff.bin
57f54a7423b335b13b8cd57d85025d0e8da0d6aa235404acab2a4e8b6ede3afc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 10768 bytes
font_01_sfnt_off00010992.bin
5937f3a2af2a40680e6e81cc54536801af167e61f4f2f651e4d8a53daa95e689
pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 17152 bytes
font_02_sfnt_off00013666.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13666 16792 bytes