Malicious PDF — malware analysis report

Static analysis result for SHA-256 6715c475fbcbea8c…

MALICIOUS

PDF

40.0 KB Created: 2020-03-20 04:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 45332212fb666debb1bc58d55c149dd4 SHA-1: 0903794f8e9d5ba7a2b9051ce6148f1b7c577218 SHA-256: 6715c475fbcbea8cb6405b63dd6203b0bc3323f5cbce18d75e5dfcc347ab5ead
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the link 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://randmc2019.com/uploads/1/3/0/7/130775174/130775174.html#icd+10+for+follicular+thyroid+cancer
    • http://angiecoxcounseling.com/uploads/1/3/0/7/130738894/c5c74664ce07.pdf
    • http://michalpaczkowski.com/uploads/1/3/0/2/130288378/8967301.pdf
    • http://michael-montoya.com/uploads/1/3/0/6/130639459/5009452.pdf
    • http://easytobuyahouse.com/uploads/1/3/0/2/130271148/bolopabetozutiwi.pdf
    • http://www.hellotherepr.com/uploads/1/3/0/2/130274032/8632453.pdf
    • http://www.younailssalonspacom.com/uploads/1/3/0/4/130483660/birajefupur.pdf
    • http://16365redington.com/uploads/1/3/0/5/130543653/6141303.pdf
    • http://blockchain-real.net/uploads/1/3/0/2/130272267/5069150.pdf
    • http://floridamasonryawards.com/uploads/1/3/0/7/130739938/1db479b1.pdf
    • http://junglekitchenmn.com/uploads/1/3/0/5/130546486/rajimav-jififa-jajuda.pdf
    • http://herkyphotography.com/uploads/1/3/0/4/130490875/tukazib-vafilizan.pdf
    • http://www.edmontonpipethreading.ca/uploads/1/3/0/6/130639887/monabenaxup-xadatuf-wajivir.pdf
    • http://underthebrolly.com/uploads/1/3/0/2/130272851/1102896.pdf
    • http://vegasnewtalent.com/uploads/1/3/0/2/130289493/lakapul.pdf
    • http://adentabrasil.com/uploads/1/3/0/2/130289641/087eb99953.pdf
    • http://referralroulette.com/uploads/1/3/0/2/130288673/5760927.pdf
    • http://midwestairsoftgroup.net/uploads/1/3/0/5/130539249/ketava-jidejidujanob.pdf
    • http://sovereignholistics.com/uploads/1/3/0/7/130775607/tajikekozi_pufusaxewuxemu_misovidi_xinaxufagamisi.pdf
    • http://www.schildersverenigingnederland.com/uploads/1/3/0/4/130483584/sezijut_buvitoko_nasajuvefi_sodiruli.pdf
    • http://www.scotnorfoto.com/uploads/1/3/0/2/130272918/xavosawusupog-narivowafa.pdf
    • http://mrsbeesteady.com/uploads/1/3/0/9/130969423/zajab.pdf
    • http://reikimoon.org/uploads/1/3/0/5/130589374/dezusuzimotilekopat.pdf
    • http://theblankproject.org/uploads/1/3/0/4/130490036/dexifutereno-mivolusug-wotuwobewojep.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_off000072d3.bin
a0104358ecffcd8e168472f3eafa834bb55db029776b9ce5940dce14491008fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 8148 bytes

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