Malicious PDF — malware analysis report

Static analysis result for SHA-256 d521e50c6910c868…

MALICIOUS

PDF

38.4 KB Created: 2020-04-04 15:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: ac87be37c7be90243e71ff1c7f0d5551 SHA-1: 5ba8a6086e3b12e4de0a880e13cea70ba4bd13dc SHA-256: d521e50c6910c868f72be444339bee4db2d4cc0f87e3cf522a2e71ccafd81fc2
116 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body includes a lure related to 'banned pit bulls in aurora colorado' which directs the user to a URL, likely to lead them to a malicious site. The presence of numerous PDF links and a callback phishing lure indicates a social engineering attempt to direct users to potentially harmful content or services.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://southernwildproducts.com/uploads/1/3/0/4/130491757/130491757.html#are+pit+bulls+banned+in+aurora+colorado PDF link annotation
    • http://elementalsilver.net/uploads/1/3/0/6/130639784/93b5abc1fa4.pdfIn PDF document text
    • http://barbara-lustenberber.com/uploads/1/3/0/7/130775497/nowedol.pdfIn PDF document text
    • http://milton-trails.com/uploads/1/3/0/7/130739362/d77fc7.pdfIn PDF document text
    • http://drkrys.com/uploads/1/3/1/0/131071164/fc99e3bce7ddc.pdfIn PDF document text
    • http://andreaspatinas.dk/uploads/1/3/1/0/131070010/rilebulanesa.pdfIn PDF document text
    • http://jhpage.com/uploads/1/3/0/8/130874165/41c6ff.pdfIn PDF document text
    • http://pruebamuli.com/uploads/1/3/0/7/130775610/10ace9f.pdfIn PDF document text
    • http://yangxchris.com/uploads/1/3/0/5/130588550/tusaviv.pdfIn PDF document text
    • http://allanhurst.org/uploads/1/3/0/5/130588670/1662166.pdfIn PDF document text
    • http://dynamicdoulas.com/uploads/1/3/0/4/130436222/fifibupovejokigabo.pdfIn PDF document text
    • http://noahsrestaurantreviews.com/uploads/1/3/0/9/130969573/8946742.pdfIn PDF document text
    • http://r3healthandfitness.com/uploads/1/3/1/0/131070605/kerirajona.pdfIn PDF document text
    • http://saltwateraloha.com/uploads/1/3/0/8/130813985/vunumup_gevobinori_komugegizuxavo.pdfIn PDF document text
    • http://tylerav.com/uploads/1/3/1/4/131437100/tulezagurixozovuvul.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 1

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_off00006e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E70 7668 bytes
SHA-256: 7c77d2a67044121a8ca69e1d87937e5eab88ae0a6e2e9c0622b4da51d28233e4

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