Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7c1dee401feb01…

MALICIOUS

PDF

89.6 KB Created: 2021-08-08 14:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d474a39c6f9cea2e934d63591233471 SHA-1: 48984ea9eb82892895d0a24b6ff8e850eaed9dec SHA-256: ca7c1dee401feb0128c722ee943a8d993c9681b6dc181fbec8c0bd9df5d82aba
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on compromised CMS platforms and disposable domains. The primary goal appears to be luring victims to these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/2ur1de8ngsurvhdvil6gg8gj2v/gokekipirojezetavajejo.pdf In PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/nofejufenufufog.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/8867734771.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cb35125fd6d---44447172338.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/nabowe.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16089019cbcd52---72507328211.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/rasosadunesasi.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/39919974441.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/wagepu.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/xodiwewul.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/s3opk7ic2632qo53kisvahv985/3432833895.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609834575f96e---39366402599.pdfIn PDF document text
    • http://lulanjina.net/upload/files/59901644217.pdfIn PDF document text
    • https://gilbertems.com/videos/file/15465824390.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/21393974304.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/wizolowegifegif.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/16340152775.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092e86b6b2c0---gifirugugajokalivimuvala.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/488396eae5315adfc640cf4691a141e9/53162459038.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9222365d7b---37446710844.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/vivoba.pdfIn PDF document text
    • http://yilip.net/userData/board/file/21948647664.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/jupetelopozo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f940af96158---53914612831.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da03fca7d43---bojifeselipaxukebujeluziz.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0879df2882d9088def0b198f74d3cb74/71118561556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=why+england+slept+jfkPDF 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_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 17528 bytes
SHA-256: ffa3887cc21b14559b202694a049e1def1e6e8c0ebde6512f349d143eebc753b
font_02_sfnt_off00013e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8B 10792 bytes
SHA-256: d8ac330311efe47beecc2e2a8405ebbe45665e22ab10db1886d74fc89e59f1e7