Malicious PDF — malware analysis report

Static analysis result for SHA-256 1606dce1b2460015…

MALICIOUS

PDF

37.6 KB Created: 2020-03-16 13:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 68deffcb579d419575b586a7a9643991 SHA-1: 7ab50775304e97fc4e545fa95effa9b7a5e7d464 SHA-256: 1606dce1b2460015899ebc679e69822cdc4c618963a16c4e0e281894c7991b24
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded URLs, many of which point to similarly structured domains. This suggests a link farm or redirection mechanism designed to obscure the ultimate destination. The ML classifier strongly indicated maliciousness, and the presence of numerous external links is a common tactic for distributing further malicious content or phishing pages. No scripts were extracted, but the sheer volume of links points to a high likelihood of malicious intent.

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://shallop40.pleasingfood.com/uploads/1/3/0/6/130620525/130620525.html#swim+lane+process+flow+template
    • http://milliondollarsmile-pp.com/uploads/1/3/0/5/130590503/3731140.pdf
    • http://wwideproducts.com/uploads/1/3/0/6/130620781/8e990d041.pdf
    • http://selfdomination.com/uploads/1/3/0/2/130272372/3261390.pdf
    • http://benyehudah.com/uploads/1/3/0/2/130270982/e3b7228b1976.pdf
    • http://webdisk.arcadianpartners.com/uploads/1/3/0/2/130272340/wisudixofafil-seradowuvu.pdf
    • http://www.hedoniarudder.com/uploads/1/3/0/2/130289561/1858175.pdf
    • http://host217.carmichaelnl.com/uploads/1/3/0/4/130483138/2001434f18615.pdf
    • http://www.struth.com/uploads/1/3/0/7/130775393/95985.pdf
    • http://hopefornela.com/uploads/1/3/0/8/130813800/7605731.pdf
    • http://haitichristianeducationfund.com/uploads/1/3/0/2/130270958/c5d671.pdf
    • http://shoebrewnation.com/uploads/1/3/0/3/130313400/1387833.pdf
    • http://companiontracy.com/uploads/1/3/0/3/130323622/xawuzovugapo.pdf
    • http://turczynproductions.com/uploads/1/3/0/8/130874600/8930621.pdf
    • http://mindmasterssociety.com/uploads/1/3/0/2/130289776/temidebumerawatakuj.pdf
    • http://www.shenyuanfan.com/uploads/1/3/0/6/130605217/mofasoza.pdf
    • http://casadetodo.com/uploads/1/3/0/5/130588497/1078626.pdf
    • http://www.taigatees.com/uploads/1/3/0/5/130542718/napipifoxuri-patasusidubuma.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006960.bin
f13ccc1dd4a1e16f041363ad55fa13dc5b1aa13d560707b00b59bf1ff521ab2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 8252 bytes

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