Malicious PDF — malware analysis report

Static analysis result for SHA-256 6209f2cd79a3bf49…

MALICIOUS

PDF

37.4 KB Created: 2020-05-18 09:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7788aedd082bc07653afb02989f945a2 SHA-1: 2efe67a005deae2cf668cc3b4bcf327f348c5c13 SHA-256: 6209f2cd79a3bf49fe09adbfee90864d995536abd9876f1370783ab3dbd17658
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, suggesting a link farm or redirection scheme designed to lead users to malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external links. No scripts were extracted, but the sheer volume of external links points to a phishing or content-luring attack.

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://newenglandtaxserv.com/uploads/1/3/0/9/130969169/130969169.html#critical+thinking+worksheets+for+highschool+students
    • http://saltwateraloha.com/uploads/1/3/0/5/130551739/03601c4b758e814.pdf
    • http://aksboutique.com/uploads/1/3/0/6/130605397/luduginalofaxi.pdf
    • http://my-healthy-primal-roots.website/uploads/1/3/0/6/130639509/simidisovewa.pdf
    • http://dynastyrei.com/uploads/1/3/0/6/130621110/leninezadatasedit.pdf
    • http://scottrosenthalphoto.com/uploads/1/3/1/4/131407504/zuvufijo_kitepagewuso_fuferijawaso.pdf
    • http://ourlifeseasons.com/uploads/1/3/0/2/130291646/42ad4369e693.pdf
    • http://azumagolf.com/uploads/1/3/0/7/130740142/misomabexama.pdf
    • http://hometohomeseniorcare.com/uploads/1/3/0/4/130489262/josuresexe.pdf
    • http://mannacashflow.com/uploads/1/3/1/6/131636772/guzozasol.pdf
    • http://gergensimmentals.com/uploads/1/3/0/4/130476327/noduken.pdf
    • http://ccprofessionaltaxservices.net/uploads/1/3/0/7/130740265/3542017.pdf
    • http://stcroixss.com/uploads/1/3/0/5/130538931/348ac.pdf
    • http://newlifewesleyan.org/uploads/1/3/0/4/130483830/dacaebdbc.pdf
    • http://malvernautotags.net/uploads/1/3/0/7/130776423/c75c0d94613.pdf
    • http://24hourtruckrvtrailerbusesrepair.com/uploads/1/3/0/6/130603994/nupurixu.pdf
    • http://dennyhomes.com/uploads/1/3/0/4/130489066/lixefisedi_woniw_tiziliva.pdf
    • http://culturadepau.org/uploads/1/3/0/8/130874073/bf0b9fba.pdf
    • http://goodywest.com/uploads/1/3/0/3/130379465/pevonirumabunabodo.pdf
    • http://balancewithkaty.com/uploads/1/3/0/2/130289723/marexowitamaxuz.pdf
    • http://equi-fix.com/uploads/1/3/0/2/130289354/nozezaruvururetin.pdf
    • http://katiegallaghermakeup.com/uploads/1/3/0/2/130272347/9231607.pdf
    • http://xn--konometrie-dcb.de/uploads/1/3/1/3/131381539/joburenipetoj_rafurireki.pdf
    • http://giftsandcraftsbyzara.com/uploads/1/3/0/4/130491008/kugawupuwi.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_off00006716.bin
2bfde86dac9e5caa56a64a2b3384a27e61c361f7ed4499e41ddba9d5101cfb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 9920 bytes

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