Malicious PDF — malware analysis report

Static analysis result for SHA-256 58293b70eab37b48…

MALICIOUS

PDF

71.6 KB Created: 2021-09-25 15:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7161adc7687a29cd3f54c5f4af695b0 SHA-1: f962b848e5f8caea95f94f718098a73cbe3fd463 SHA-256: 58293b70eab37b480280d3d7646032a9010f8ec19b2eb550452230b75ded3977
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or scam lure. It contains numerous links, many pointing to potentially compromised WordPress upload storage or disposable hosting, suggesting an attempt to direct users to malicious content. The heuristic 'SE_CALLBACK_LURE' further supports a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=distance+travelled+in+nth+second+of+uniformly+accelerated+motion
    • https://slicktechproducts.com/newerac2c/userfiles/file/58754282812.pdf
    • https://pepinieramontana.ro/ckfinder/userfiles/files/pexivulejaruzenazo.pdf
    • http://eiak.org/upload/editor/files/62027161169.pdf
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/9525211715.pdf
    • http://www.zywawiara.pl/pliki/sixugikode.pdf
    • http://mannaz.pl/userfiles1/file/vukig.pdf
    • http://hanleyresources.com/images/29220204978.pdf
    • https://saigonservices.vn/images/uploads/files/17983384942.pdf
    • https://parc-hotel.info/file/kamede.pdf
    • http://alotercuman.com/ckfinder/userfiles/files/27734405707.pdf
    • http://etre-belle.su/images/file/45822623058.pdf
    • http://a1climbing.com/userfiles/files/30399923979.pdf
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/75911598626.pdf
    • http://prinsart.ro/uploads/files/93656666649.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0921aba66---tadenunuduxifubejelag.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/e7ctcojesgcn9t6emtcr028gt7/52733324385.pdf
    • https://triptoboloyfoundation.org/editorsfiles/files/94347196807.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613add091be7b---supidekajufexuxaxeler.pdf
    • http://halaljones.com/uploads/files/54557232944.pdf
    • http://ctnphrae.com/ckfinder/userfiles/files/16117075190.pdf
    • http://meetburgerusa.com/uploads/files/voviwevujexolunexil.pdf
    • http://caratow.nl/userfiles/file/38148162463.pdf
    • http://quocteanviet.com/img-chamthi/files/xenurifigaki.pdf
    • 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_off0000b209.bin
7b4864a12a223f31c57788e06a5543f00b3fb64daad71afd23f042a24a8f077e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB209 16616 bytes
font_01_sfnt_off0000dc40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 16792 bytes
font_02_sfnt_off0000f457.bin
3323b4c218fa1891e7b3be9d1d63e6dec68e8b4d8eae4c4f8e13c7560942564c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 11024 bytes