Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ba2715e291d787…

MALICIOUS

PDF

38.0 KB Created: 2020-05-17 21:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: df2ba2e096265447d1af8067482156c4 SHA-1: 0b0a4428ae0da0a1d5c9ecd80ffef7b815919866 SHA-256: b0ba2715e291d787271736bdf55443a0fe4d2d588029e005bb9fd2ac4de86af4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to drive traffic to potentially compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://theanxietyonline.com/uploads/1/3/0/4/130477633/130477633.html#funny+kahoot+questions+and+answers PDF link annotation
    • http://thesprinkledcompany.com/uploads/1/3/0/2/130287942/5725576.pdfIn PDF document text
    • http://elliescrayoncollective.com/uploads/1/3/0/6/130605376/937566e23f9.pdfIn PDF document text
    • http://orabuilt.com/uploads/1/3/0/6/130620704/8853263.pdfIn PDF document text
    • http://popsiefish.com/uploads/1/3/0/7/130740477/211593.pdfIn PDF document text
    • http://chummykids.com/uploads/1/3/1/4/131453194/cf79c1c.pdfIn PDF document text
    • http://musicbygene-o.com/uploads/1/3/1/4/131407588/xinukuletela-dijapivebefuzol.pdfIn PDF document text
    • http://supremecupcakez.com/uploads/1/3/0/9/130969824/515483.pdfIn PDF document text
    • http://dynamicsoundbarrier.com/uploads/1/3/0/5/130540063/zewavazuketavon.pdfIn PDF document text
    • http://purelyrecycled.com/uploads/1/3/0/7/130740412/73569.pdfIn PDF document text
    • http://villagedoula.com/uploads/1/3/0/7/130776483/99d89f0cf.pdfIn PDF document text
    • http://dumphimforme.com/uploads/1/3/0/5/130590265/semurogag_gikufasam_jorapa_kugubejuvevemek.pdfIn PDF document text
    • http://drumlessonsatl.com/uploads/1/3/0/9/130969748/xowapukup.pdfIn PDF document text
    • http://constancerosehouse.net/uploads/1/3/0/6/130603917/rosisoxurijarek-sikuni-nuporotojebinaj-nurazudeji.pdfIn PDF document text
    • http://kasvinkumppanit.fi/uploads/1/3/0/6/130620575/tavugu.pdfIn PDF document text
    • http://mam-design.com/uploads/1/3/1/3/131381204/424cbb.pdfIn PDF document text
    • http://billsfrenchbulldogfriends.com/uploads/1/3/1/4/131453045/magurixite_velesefi_fikarejijoberat_lerexin.pdfIn PDF document text
    • http://kenplattlaw.net/uploads/1/3/0/7/130740257/fopapezofuk-fefepad-jorapuwas-dejulivolupes.pdfIn PDF document text
    • http://grzegorzmarcinek.com/uploads/1/3/0/4/130476066/60fa45e40c68a6e.pdfIn PDF document text
    • http://sandiegoeatingdisordertherapist.com/uploads/1/3/0/6/130621140/kabenunizaxelod.pdfIn PDF document text
    • http://donfranciscocigarstoo.com/uploads/1/3/0/6/130639705/radivo.pdfIn PDF document text
    • http://modelsinamansion.com/uploads/1/3/0/4/130436159/7492090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 10200 bytes
SHA-256: 0ae49d54ec9e4a2564edcf4f368c89929e7be887d5073e4073c112bc0a189c6a

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