Malicious PDF — malware analysis report

Static analysis result for SHA-256 043d793090d5af65…

MALICIOUS

PDF

32.6 KB Created: 2020-05-13 21:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7ce3f06b23654d472d6a717ebd48ffc3 SHA-1: 86fd4e680e007af6d810077b965482f94203daad SHA-256: 043d793090d5af653f38ece5b64e18181759749d332e6bd9202c27787b55f4b1
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be SEO spam or directing users to potentially malicious content hosted on these numerous domains. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of outbound links is highly suspicious.

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://cheflexielogan.com/uploads/1/3/0/7/130739584/130739584.html#genki+ii+answer+key
    • http://lonniebcreativedesigns.com/uploads/1/3/1/0/131070727/vavibisotaxi_jonexegulo.pdf
    • http://dennisgreenmarketing.com/uploads/1/3/1/4/131453087/xoxozig.pdf
    • http://hydrolactic.com/uploads/1/3/1/3/131381589/6127756.pdf
    • http://qiyishronwu.com/uploads/1/3/1/1/131164023/vuwefadunasajono.pdf
    • http://fjordpharmaceuticals.com/uploads/1/3/0/5/130590123/zupusegogoseguk_ledenewakodopum.pdf
    • http://expertmind.org/uploads/1/3/0/7/130776786/kilovewijowefadibuxo.pdf
    • http://renewgeneseehealth.org/uploads/1/3/0/4/130436288/gebotunukowe.pdf
    • http://neuenhausglass.com/uploads/1/3/1/8/131857057/ribenuluvebaxabiso.pdf
    • http://robinsonsdiscoverytree.org/uploads/1/3/0/3/130379408/tawijog.pdf
    • http://proflue.net/uploads/1/3/0/7/130776601/83c672f47.pdf
    • http://mspurbanloftoffice.com/uploads/1/3/0/9/130969772/towogomapufe.pdf
    • http://fresh-air-yoga.com/uploads/1/3/0/4/130476244/d2e1a83747fad9.pdf
    • http://fivestartinting.net/uploads/1/3/0/5/130590177/658480.pdf
    • http://flyinghighcafe.com/uploads/1/3/0/2/130288391/3ea7795.pdf
    • http://obakosobotanica.org/uploads/1/3/1/4/131406932/xebonudidifemuz.pdf
    • http://cordobainn.net/uploads/1/3/1/0/131071166/wiketoberetigigedusa.pdf
    • http://mountainwomon.com/uploads/1/3/0/7/130776498/xiwako.pdf
    • http://energybalancem.com/uploads/1/3/0/5/130550847/rusesose_wadimiluf.pdf
    • http://depunive.com/uploads/1/3/1/4/131453260/nedom.pdf
    • http://healing-together.com/uploads/1/3/1/4/131437669/f8a7316f9f.pdf
    • http://sesametheopossum.com/uploads/1/3/1/3/131380729/ed9f69571c00.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_off000055c9.bin
e5e2ee181557496406277b6a18e1a0c9d54ba104f99528d0ba8bc7922dd3e5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C9 9696 bytes

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