Malicious PDF — malware analysis report

Static analysis result for SHA-256 03934a84e7c1ebd5…

MALICIOUS

PDF

44.5 KB Created: 2020-04-02 09:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 42c88c2494090f652660e8fbba2b8f64 SHA-1: feedecb2966da91cf227274707e6700c2e70776c SHA-256: 03934a84e7c1ebd5c898d602ec6da1a95e797a76d66323ff520f591a88504616
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a method to distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links is highly suspicious and indicative of a malicious intent, likely related to SEO spam or malware distribution.

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://mikeintucson.com/uploads/1/3/0/5/130588701/130588701.html#lista+de+los+libros+del+antiguo+testamento+biblia+catolica
    • http://rds-aviation-of-the-world.net/uploads/1/3/0/5/130590469/dituwevewolu.pdf
    • http://reliablelimoja.com/uploads/1/3/0/7/130739835/9e4e54.pdf
    • http://mikeflattdesign.com/uploads/1/3/0/9/130969317/tenobiki.pdf
    • http://ebssportseht.com/uploads/1/3/0/5/130589264/nobafimoselazefud.pdf
    • http://jheft.com/uploads/1/3/1/4/131452840/3872901.pdf
    • http://miraalhammadi.com/uploads/1/3/0/4/130483309/jukavuwegul_wivefarepese.pdf
    • http://cambridge-wellbeing.com/uploads/1/3/0/7/130740367/873e2ba.pdf
    • http://weblearninggroup.com/uploads/1/3/0/5/130540085/8837643.pdf
    • http://mail.shoreliteracy.org/uploads/1/3/0/7/130775448/sojeviz-lifepesax.pdf
    • http://judemarfa.com/uploads/1/3/0/7/130775278/73e5617.pdf
    • http://ghmotteronline.com/uploads/1/3/0/6/130620176/tekemijawofap_gonor_xidij_bigirajare.pdf
    • http://wingsofhealing.global/uploads/1/3/0/6/130603721/3627546.pdf
    • http://mrshawkinsclass.com/uploads/1/3/0/3/130379422/nofujopunerew-jijores-tufarufifawisu-tajezifemo.pdf
    • http://pioneerwinelouisiana.com/uploads/1/3/0/5/130542972/kexefunekalana_wutaxiwoxijo_taxazogaxeti.pdf
    • http://rsdesignservice.com/uploads/1/3/1/3/131379663/pogomitujog.pdf
    • http://ifossicker.com/uploads/1/3/0/6/130603900/depowofazari.pdf
    • http://throughthestormapparel.com/uploads/1/3/0/5/130543536/6f9db.pdf
    • http://artisticresinouscoatings.com/uploads/1/3/0/4/130483634/piwita.pdf
    • http://morningsunshinebath.com/uploads/1/3/0/8/130873787/167a0a58dc9ad.pdf
    • http://katoacellars.com/uploads/1/3/0/5/130551611/nupowufi.pdf
    • http://inceptionsdesign.net/uploads/1/3/0/3/130313376/8512245.pdf
    • http://maid2sparkle.net/uploads/1/3/1/3/131380720/zovepikuzegakalez.pdf
    • http://fosterfalcon.com/uploads/1/3/0/6/130604249/e48052510637506.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_off000083b1.bin
39c2facd1e86ef0af92dd5eac80ea70b9a5441389b680ba2ec0fddb24c820b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B1 8960 bytes

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