Malicious PDF — malware analysis report

Static analysis result for SHA-256 6840306392db0144…

MALICIOUS

PDF

80.8 KB Created: 2020-05-14 17:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: de0392aef9edf23e0084590acdb81d38 SHA-1: 3c012d8afec522ed958bdbedad1cca6ffb81dd46 SHA-256: 6840306392db014435d375eeb2429c6e20e0ac0d2fa9885abc3dd723f3eb6568
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links to external websites, many of which are structured as PDF files with numeric slugs, suggesting a link farm for SEO poisoning or phishing. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or session tokens by mimicking a multi-factor authentication prompt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://bugoza.com/uploads/1/3/0/9/130969368/130969368.html#streaming+platforms+in+canada PDF link annotation
    • http://lffitnesshamptons.com/uploads/1/3/0/7/130739624/4664221.pdfIn PDF document text
    • http://rgtaz.info/uploads/1/3/0/5/130547659/rojuninafinanif.pdfIn PDF document text
    • http://lovetolearnfl.com/uploads/1/3/0/9/130969231/13032.pdfIn PDF document text
    • http://uralmotorcyleparts.com/uploads/1/3/1/4/131483153/deab514c7fe.pdfIn PDF document text
    • http://mosaik-fabrik.de/uploads/1/3/1/6/131606789/2e3d410c19.pdfIn PDF document text
    • http://madisonborthcollages.com/uploads/1/3/0/3/130379326/6518055.pdfIn PDF document text
    • http://sheepadoodless.com/uploads/1/3/0/6/130620838/3053614.pdfIn PDF document text
    • http://fabcreteindustries.com/uploads/1/3/0/6/130620818/gezozoxesag_sijuwu.pdfIn PDF document text
    • http://woodhouseandassociates.com/uploads/1/3/0/7/130740242/zolovuxobirazore.pdfIn PDF document text
    • http://stgeorgebt.com/uploads/1/3/0/5/130543813/9652932.pdfIn PDF document text
    • http://urbanvertical.ca/uploads/1/3/0/7/130740492/degeromunegibureno.pdfIn PDF document text
    • http://christopherreyesstudio.com/uploads/1/3/0/5/130550956/joruw_tufufetunuki_veraxub_ribavud.pdfIn PDF document text
    • http://pensacolaseoandwebdesign.com/uploads/1/3/0/7/130775965/pewavusope-bikalokowin.pdfIn PDF document text
    • http://gloriaanholt.com/uploads/1/3/0/6/130605084/7720809.pdfIn PDF document text
    • http://clowultimatehealthsolutions.com/uploads/1/3/1/4/131437655/jogufezusuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn 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_off000111c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 11496 bytes
SHA-256: a8eced8ee222e3c98e924b72435395817040322eabd468039719f0df847fed55

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