Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb358fc3b19a490f…

MALICIOUS

PDF

37.2 KB Created: 2020-04-11 12:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 35133d1061ae4310390ea88de8c1ae01 SHA-1: 83099d6d307ac46d9104ea38acfb3dd0a525873f SHA-256: cb358fc3b19a490f27fdb397fd90d786f9e894bbb94f890856e2ac38c5d42268
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

This PDF document was detected as Pdf.Dropper.Agent-9157557-0 by ClamAV. It contains a large number of external links, many pointing to PDF files on various domains, suggesting a link farm or SEO abuse tactic. The document body also contains a callback phishing lure, instructing the user to call a phone number in a context of billing or security issues. The primary intent appears to be social engineering to extract money or information from unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-9157557-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9157557-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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) or Microsoft license-boilerplate 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 http://brightwaylearningcenter.com/uploads/1/3/0/4/130489367/130489367.html#stanley+15+amp+battery+charger+manual PDF link annotation
    • http://legitarate.com/uploads/1/3/1/4/131408204/4f6c6993.pdfIn PDF document text
    • http://dapgent.com/uploads/1/3/1/1/131164229/8474112.pdfIn PDF document text
    • http://jamaicatraffic.com/uploads/1/3/0/3/130323423/totamebavakuwof.pdfIn PDF document text
    • http://lostonmars.com/uploads/1/3/1/0/131071176/1221218.pdfIn PDF document text
    • http://salihguzelcik.com/uploads/1/3/0/7/130776511/104992.pdfIn PDF document text
    • http://thecraftroomomaha.com/uploads/1/3/0/2/130287538/a6a965b388.pdfIn PDF document text
    • http://graniteandmarbleservice.com/uploads/1/3/0/5/130550915/0170bd2e7.pdfIn PDF document text
    • http://bgraceart.com/uploads/1/3/0/8/130814510/tixeku.pdfIn PDF document text
    • http://scgoldenconstruction.com/uploads/1/3/0/6/130621502/vevutelupidivis_zegobatofebepuk_jawikifag.pdfIn PDF document text
    • http://beyourselfie.net/uploads/1/3/1/3/131398452/wexusiloborit.pdfIn PDF document text
    • http://wendys-jones-stylist.com/uploads/1/3/0/6/130639994/44a030d94e.pdfIn PDF document text
    • http://sondetikizia.com/uploads/1/3/0/3/130379503/rubeledazero-vikejinudabiwe-domotanobaliniz-japafapenapa.pdfIn PDF document text
    • http://shubla.com/uploads/1/3/1/4/131453146/lelegu.pdfIn PDF document text
    • http://carriescustomcrafting.com/uploads/1/3/0/6/130640049/foxerifejejimusemimo.pdfIn PDF document text
    • http://codermonthly.com/uploads/1/3/0/2/130270776/27871e9.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 7868 bytes
SHA-256: 44fc77465fff41ff5664ce6e68a5e3d9dd09b2b759f92d2872913471dc238b69

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