Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62f73ac846dbdd4…

MALICIOUS

PDF

31.9 KB Created: 2020-05-16 06:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 9103563203a981676045a71f8b3230d7 SHA-1: 811a24c279bd5456fd3689d973efcafdb23292b5 SHA-256: d62f73ac846dbdd429ff341eecb53760bf19a0591cb3d1e9d953c1aa9168569e
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, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes the title 'Mirelurk wasteland survival guide' and references to 'wkhtmltopdf', suggesting a lure for users to click on these links. The primary intent appears to be SEO manipulation or distributing secondary payloads via the numerous linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://eurolotto-biel.ch/uploads/1/3/0/4/130488983/130488983.html#mirelurk+wasteland+survival+guide PDF link annotation
    • http://lighthold.org/uploads/1/3/1/4/131407227/a85eab203630.pdfIn PDF document text
    • http://striveforahighfive.com/uploads/1/3/0/6/130620509/zudokezawarijugodu.pdfIn PDF document text
    • http://mynutrition101.com/uploads/1/3/1/4/131437982/3488900.pdfIn PDF document text
    • http://stbarnabasindy.org/uploads/1/3/0/6/130605351/ae355efaf9fbe.pdfIn PDF document text
    • http://ryaniii.com/uploads/1/3/1/3/131379709/7212895.pdfIn PDF document text
    • http://virtualproductshots.com/uploads/1/3/1/1/131164291/bibesulo.pdfIn PDF document text
    • http://allfreepicks.org/uploads/1/3/0/6/130603815/sopemigosinovinurug.pdfIn PDF document text
    • http://jennaduey.com/uploads/1/3/0/8/130873863/2d8d1b9b92136.pdfIn PDF document text
    • http://sportmshenservice.com/uploads/1/3/0/8/130814513/d08129913.pdfIn PDF document text
    • http://jacquemcdonald.net/uploads/1/3/0/9/130969481/7728731.pdfIn PDF document text
    • http://acmereclaim.com/uploads/1/3/1/8/131871767/42002.pdfIn PDF document text
    • http://irvingpestpros.com/uploads/1/3/0/2/130287835/sidufetadobode_fededifum.pdfIn PDF document text
    • http://oilelements.com/uploads/1/3/0/2/130287454/nulaborepag.pdfIn PDF document text
    • http://alfa-spanish.org/uploads/1/3/0/4/130477252/4761121.pdfIn PDF document text
    • http://dogemoon.net/uploads/1/3/1/4/131437859/6175993.pdfIn PDF document text
    • http://thekikihamilton.com/uploads/1/3/0/5/130590521/jikalefajegeror.pdfIn PDF document text
    • http://yu-skin.com/uploads/1/3/1/4/131413678/kazewalo_dokor.pdfIn PDF document text
    • http://mkgfashion.com/uploads/1/3/1/4/131406077/gesanefaru.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 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_off0000530c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x530C 9644 bytes
SHA-256: aa6ec689b0c0a210e55daa23b6b996d7f756d521d5ca334409e5399dbadbda08

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