Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63b2e2290f496a2…

MALICIOUS

PDF

67.2 KB Created: 2021-02-27 14:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eaf7b145398168e5899e52ec33d49d25 SHA-1: 14ffbb11c65d081c658818f0504854864cbbb17a SHA-256: a63b2e2290f496a2c12189164d7ba082f5166807fa11089e9fca87e24353e487
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://botokaw.ru/award?keyword=navy+recruiting+office+menifee+ca PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380083/normal_60184fb422118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_5fd33a1c3f3fe.pdfIn PDF document text
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/gabisidutobo-tipulemosol-nesifawere-bilebop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5fe5619c107d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5ff05dbec8a12.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/gepon.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/vexelafegikonab_sodupi_wuwozozep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fdb132024639.pdfIn PDF document text
    • https://milorali.weebly.com/uploads/1/3/5/9/135965765/7efdc8a7aa9fd.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/Yhi5Fjf/old_national_bank_mortgage_loan_rates.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/8502b9f71a.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/df7eb.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/widuxade/54957123638.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/jamb_maths_questions_and_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/england_s_glorious_revolution_timeline_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/guvaxugebixorakegokegifa.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/xukiravalobevositub.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_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 5124 bytes
SHA-256: 4dc4accfc27d4a0b06d035d6f5ad62164ea4733e8ebbcb7e4ecbf00852ad26ef
font_01_sfnt_off0000dd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 10044 bytes
SHA-256: 77d0f9f4b38cc7d9f391718628fea64195398f51934bd63482f86c42bc6e2b80