Malicious PDF — malware analysis report

Static analysis result for SHA-256 185a7390984f1526…

MALICIOUS

PDF

34.7 KB Created: 2020-05-16 17:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f14ee6c42e06e5807a61f59e84ceb84b SHA-1: b6a0fa08392fb6043470eb121fb2dc2d4d8e4e28 SHA-256: 185a7390984f1526c47bbb33bc3ab3774c7b0db23b429e20b4f5204cd08eeadf
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to direct users to malicious content or manipulate search engine results. The presence of a URL referencing 'battery doctor old version apk' indicates a potential lure for users seeking specific software. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

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://corinneweiss.com/uploads/1/3/0/7/130738786/130738786.html#battery+doctor+old+version+apk
    • http://birdhousedesigncompany.com/uploads/1/3/1/4/131409017/1984051.pdf
    • http://lascasasdeoro.com/uploads/1/3/0/7/130774981/2437608.pdf
    • http://logicmarketingbusiness.com/uploads/1/3/0/7/130776457/telutobekuronupafowo.pdf
    • http://alanhubatka.com/uploads/1/3/1/1/131164012/rukifabimomat-xezevo.pdf
    • http://highdesertpaints.net/uploads/1/3/0/3/130312913/402cd5fc14.pdf
    • http://cocoglamhair.com/uploads/1/3/0/4/130483629/purojuwubajubalepi.pdf
    • http://theoceancolombo.lk/uploads/1/3/1/3/131382387/sabexewuzevil.pdf
    • http://jennmanning.com/uploads/1/3/0/5/130551727/b05977b.pdf
    • http://incomewebstores.info/uploads/1/3/1/4/131406149/7214392.pdf
    • http://refinedrustics.com/uploads/1/3/1/4/131453531/lukezupetunemojo.pdf
    • http://hippie34.com/uploads/1/3/0/7/130775306/pumirorusuxajuk.pdf
    • http://micahlavigne.com/uploads/1/3/1/1/131164452/lelipib-kofub.pdf
    • http://dirtyhippymovie.com/uploads/1/3/0/3/130324331/vinufet.pdf
    • http://dugjob.com/uploads/1/3/1/4/131407901/wezax_rexibo.pdf
    • http://drencheddivers.com/uploads/1/3/0/6/130604863/4425658.pdf
    • http://miscmgmt.com/uploads/1/3/0/8/130873779/4a8b91b219c.pdf
    • http://therelentlesspursuit.us/uploads/1/3/0/4/130479389/2795132.pdf
    • http://centerofvolleyballexcellence.com/uploads/1/3/1/1/131164476/41d06a2bf817c8.pdf
    • http://dresspower.com/uploads/1/3/0/4/130490776/9930644.pdf
    • http://cogien.com/uploads/1/3/0/6/130620695/a37bc4f.pdf
    • http://boatinsurance.wales/uploads/1/3/0/8/130874269/dawiso.pdf
    • http://bellevuebraintrust.org/uploads/1/3/0/7/130776855/nosixofim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c63.bin
d9e8d6268a1ee23da51cc5a0a3fbe8ef2bfbf50007cce576c06a8840342e8c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 10108 bytes

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