Malicious PDF — malware analysis report

Static analysis result for SHA-256 4850d787195cb78c…

MALICIOUS

PDF

40.8 KB Created: 2020-04-01 20:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5a02029a0ba5f4dd05d90bbcd31ab534 SHA-1: d56cd563afe2f5719403da7b16f5804ef944d975 SHA-256: 4850d787195cb78cb00cfd826241347a8246435bd2173c4a4f64df03222ec2a3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links pointing to other PDF files hosted on various domains. This pattern is indicative of a link farm or a phishing campaign designed to distribute malicious content or redirect users to fraudulent sites. The document body itself is largely unreadable, but the presence of numerous SEO-like URLs suggests a coordinated effort to manipulate search results or distribute content widely. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://onenine8fiverace.com/uploads/1/3/1/3/131380842/131380842.html#manualidades+con+rollos+de+papel+de+ba%C3%B1o+para+ni%C3%B1os PDF link annotation
    • http://soloforsenate.com/uploads/1/3/0/6/130622000/finupafujofo.pdfIn PDF document text
    • http://aerialarts-classes.com/uploads/1/3/0/2/130289648/4cf0d2ea.pdfIn PDF document text
    • http://weclearstoppages.com/uploads/1/3/0/3/130323124/kutijawuval_wikadefimoda.pdfIn PDF document text
    • http://ldconsulting.org/uploads/1/3/0/2/130272603/bunenusokepo.pdfIn PDF document text
    • http://boxtom.com/uploads/1/3/0/7/130776541/lasitagudunaza.pdfIn PDF document text
    • http://centuryglassdfw.com/uploads/1/3/1/3/131379054/punuzuf_rujur.pdfIn PDF document text
    • http://zittelsfamilystables.com/uploads/1/3/1/3/131379803/beff80.pdfIn PDF document text
    • http://lf-ant.com/uploads/1/3/0/4/130435982/6359100.pdfIn PDF document text
    • http://seahawksanalysisnewsandreviews.com/uploads/1/3/0/6/130620793/jefalofoxuzilos.pdfIn PDF document text
    • http://deluxedigitalstore.com/uploads/1/3/1/0/131070190/geroxezupog_vedoluvukubo_najelunedabuj.pdfIn PDF document text
    • http://aftandanchor.com/uploads/1/3/0/5/130588806/pawijanabobu.pdfIn PDF document text
    • http://andynelmeshomeimprovements.com/uploads/1/3/0/8/130873906/81ae537e7446e.pdfIn PDF document text
    • http://openingeyesllc.org/uploads/1/3/0/4/130483875/nugulakabo.pdfIn PDF document text
    • http://harveyrei.com/uploads/1/3/0/5/130539316/4913785.pdfIn PDF document text
    • http://ellismgt.com/uploads/1/3/0/8/130813413/790ed77462d9258.pdfIn PDF document text
    • http://metropcsautoadverts.com/uploads/1/3/0/5/130543665/9102816.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
🗂 Part of campaign: ellismgt.com 7 samples

Related samples 2

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_off0000748e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 8276 bytes
SHA-256: 08f4c858b644b586ee3fa0119b699cfb659fdb06c377916666ac517a485004e6

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