Malicious PDF — malware analysis report

Static analysis result for SHA-256 462b23109011064d…

MALICIOUS

PDF

86.4 KB Created: 2021-07-21 07:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d8fde114ea65ad2ed8540d505bf1b330 SHA-1: 0fa9f274aa79f036e2cec502a2f90d2236bd8fa7 SHA-256: 462b23109011064d78244dd76c3a2bd7126195f16ac17e0ec5b3a7ded6b9d72d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a165560fa---tunipag.pdf In PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/kazewon.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/8m3vtfaoqunhfq39j5i7tev2kg/37392307389.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/f10af305153d8c022e5a387011923195/xaxotabefogerisotaxokapan.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/81767152864.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c7c2bea2b---75786966513.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/80530754b2245c6155bf4e0b1aab15d9/wojosa.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e297da39b---3712302689.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/c2pimss99bvpofgna6hrragei7/26960517952.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/56257702364.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/xukogeborelixudaba.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6540a7a8---21203088741.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608230f4f163a---girelubuxojuparuxot.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7ab61003---robivisuroxufifodekukobor.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/xixetesive.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/efteo93n44tgptjlpt8ech55p0/pufigarosuxibatesuten.pdfIn PDF document text
    • http://skncn.com/u/files/36195694541.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///vogulowupowena.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/17622993696.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8015be6d7c---malixovabolutuvizu.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a553bdd2---48598510897.pdfIn PDF document text
    • https://altbuket.ru/files/mugoputovugafafodexeva.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/fubabab.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/94270492748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=deathwatch+rpg+reviewPDF 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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10368 bytes
SHA-256: 113419c729ef12e03e7cc210a59f4675f70e4b443d40bdb712c654ea2060ba00
font_01_sfnt_off00010839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 16984 bytes
SHA-256: 922ecdbe11fb08d220576535ce9b400e8bef645af4bbb05ee1636a56622f810a

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