Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec9f87fc2d2ea2f…

MALICIOUS

PDF

80.3 KB Created: 2021-01-22 01:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e0b23c3c8c4e8fade56c22ea498a1cd5 SHA-1: 9385e1386fa8aa8059a7d3e434d859c8911d0f04 SHA-256: aec9f87fc2d2ea2f57bde2373e28684caf890403ff2178bf7dc2d81016ffddca
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://bologen.ru/aws?utm_term=bartlett+tree+research+laboratories+technical+report PDF link annotation
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/8242772.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/zoxuxarawe_pirafej.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/ruzesufoxejunuban.pdfIn PDF document text
    • https://mesofuxemivoge.weebly.com/uploads/1/3/1/3/131398024/muguwejuzukanex.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/motebawadamelixisifo.pdfIn PDF document text
    • https://site-1176955.mozfiles.com/files/1176955/pavujifupivolabanexakuk.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/440cfa916ed82c1.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/7471475.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/a8dfca5dc46e6a.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/gegisizeritaj-xerix-mapimavafuwu-jekujixibep.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/zawixivevudeb-bafexa-xisix.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/talegafoba-rolak-ruzowodeju-gegaga.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/3150412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volapubexu.epizy.com/milton_on_stour_primary_school_ofsted_report.pdfIn PDF document text
    • http://marivugedada.epizy.com/caaspp_practice_test_answers.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_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 5212 bytes
SHA-256: 9af0fc6fd9e101655201ba12e34942584e48b756991e7669a008fdc89186dd2e
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 11632 bytes
SHA-256: 67eea4501ea1551807bd592d71f6349679c73aa2548d8746c2e92a0add970d63

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