Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5309fbac3ec235…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 10:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 488fe20d14324b7335143e3b0e0f74d9 SHA-1: 930250b83ffad1619d4582cfdbb7d2532f6fceda SHA-256: 0f5309fbac3ec235f2cf16a85a96f7321cdeaaf48d8e872b9a6ddc22c1b51dc9
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://maypoin.ru/strik?utm_term=how+to+register+commercial+vehicle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5fcbd933edb89.pdfIn PDF document text
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/kelilaz.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/173515b4.pdfIn PDF document text
    • https://gizizajavime.weebly.com/uploads/1/3/2/6/132695742/5177775.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/3f2d9.pdfIn PDF document text
    • http://discovljzg.fun/street_soccer_flick_hack_apktrbh4.pdfIn PDF document text
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/8294263.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/e5604df3e9.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/gozifep/management_accounting_process.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/badri_audio_songs_free_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/midokudap.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/daftar_asmaul_husna_dan_artinya.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/79421317894.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/96337755159.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/how_to_scan_on_motorola_xts_5000.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_off0000d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 5328 bytes
SHA-256: e35f949f13b9fbf93939ab98592d6f39559bc8aa192c6de7fa6840a3325ee5df
font_01_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 10768 bytes
SHA-256: c518238ddf124ee091ad0338ee0b7490dc45e80ca81ca03cdf99c0401ae8431d

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