Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a7106d75a3736e…

MALICIOUS

PDF

83.5 KB Created: 2021-02-15 07:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d2cd721f9949277389b710e150e0322c SHA-1: c741ed9e1c107239270f5054d05b3f2e9e6c5312 SHA-256: 96a7106d75a3736e07c44530f3eadd0687bd5cca60f0e0532dc38e07c63bf741
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=2015+ap+physics+1+free+response+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5fd179e969f0d.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/rIgic1N/tegusobutesejat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_5fd6735164c92.pdfIn PDF document text
    • https://pudijamarotu.weebly.com/uploads/1/3/4/0/134000536/8559468.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ghbihN1/57431362193.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/fEgiNBT/pocket_door_kit_30_x_80.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/fulenixoxepeju.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/fuahdCM/39462098008.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/gfvgcFl/flip_water_bottle_challenge_fortnite.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/ijbihgh/mechanic_near_me_open.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jheshbG/terra_nova_test_3rd_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fc6ba4f2843a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417029/normal_5ffb95d139720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_600a491a9f830.pdfIn PDF document text
    • https://vaxokivov.weebly.com/uploads/1/3/1/4/131453734/bowenuw_jemosusakajimo_gigopava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://secure-media.collegeboard.orgIn 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_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 5616 bytes
SHA-256: 727466eca4a9913dd7adc211d6bbbfa24ad974ff988195aba349b86d725b6896
font_01_sfnt_off000119d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D3 11128 bytes
SHA-256: 3617562b6fa4062ac5594706b78a2aac09b94a9777bb9c7dccd2e432beb11694

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