Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5289ea9e1a4165…

MALICIOUS

PDF

71.9 KB Created: 2021-03-04 05:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cf041f23bda021a5de82ec179affb8a3 SHA-1: c4b05655f847cae8ab6df5c302495e7a2f51ecfd SHA-256: bf5289ea9e1a4165ac1ccd7638d0d45efe6e01d7f1cdac6214130b1ece09ac90
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://resalured.ru/wix?keyword=tigard+high+school+swim+center PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489850/normal_5ffcce29bd0a9.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/HrHjdR6/11154226610.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/a73f059.pdfIn PDF document text
    • https://lakafirawitekir.weebly.com/uploads/1/3/4/0/134018328/pozisob-xowirarobamo-vixekomume.pdfIn PDF document text
    • https://giximelet.weebly.com/uploads/1/3/4/2/134234701/754473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5fe7b35d048ef.pdfIn PDF document text
    • https://xotoxagat.weebly.com/uploads/1/3/4/7/134753993/40d9a73714e.pdfIn PDF document text
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/9044862.pdfIn PDF document text
    • https://vumazara.weebly.com/uploads/1/3/0/7/130738753/viturofalafuxogojig.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/43206373593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465400/normal_5ffd400852c6d.pdfIn PDF document text
    • http://golixudib.mypressonline.com/77023619661.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/dakolilaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/sound_landforms_around_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/mojagisabem.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/52299938262.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 5396 bytes
SHA-256: 3188a7083f06c49ca5bfd40603d2ae87c936a464e1557a184714f1188d8e4608
font_01_sfnt_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 10232 bytes
SHA-256: e151216c2b0fc1177a30cca97e27ece888c56b79c18bb1508c19ef7e71d0f894

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