Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9b158cefec59fa…

MALICIOUS

PDF

66.5 KB Created: 2021-02-27 06:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78a6aed367fbb5ce307b612f506748f1 SHA-1: 0e719e82073eb773af7a2a12dddc8e748b2b3f47 SHA-256: 1a9b158cefec59fa7a49e7f6366250ddb7d87ba6e8b07865b5d66bb3f94a12f6
186 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ponafet.ru/wix?keyword=bellingham+fire+department+phone+number PDF link annotation
    • http://merishwheelrecords.com/does_s_curl_make_your_hair_growm7d3m.pdfIn PDF document text
    • http://leaninrzpd.site/gifixebijezunamoeim5x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fd354ed224a8.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4383577/normal_6014e358b5467.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/dojamavipodedu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416128/normal_5ff9d00323469.pdfIn PDF document text
    • http://wspring.space/data_abstraction_and_problem_solving_with_java_3rd_ed6jpqq.pdfIn PDF document text
    • http://vigastlens.xyz/softee_ice_cream_truck_san_josep6ag7.pdfIn PDF document text
    • http://leaninrzpd.site/gifIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifemulawej.epizy.com/69345039987.pdfIn macro / runtime command snippet
    • http://sobuzazan.rf.gd/57374271807.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/biodynamic_compost.pdfIn PDF document text
    • http://gavuzolu.epizy.com/ascending_tracts.pdfIn PDF document text
    • http://ziwutaje.epizy.com/nezatitita.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/thinking_out_loud_piano_chords.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_off0000c933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC933 5468 bytes
SHA-256: 0a1a116751c751cbf8187c08c1567d98683b44cae2555f56ade0218f39008d66
font_01_sfnt_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 9832 bytes
SHA-256: 76c3a7f8b6dfe619d2657a90a1a7cdf0a2d0da6a349b543c0b85e1d8b22578fc