Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98c3d7fd337181a…

MALICIOUS

PDF

77.5 KB Created: 2020-12-26 11:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d1f9e31359c0bdd060ef9e705f72fee6 SHA-1: 2127a176c6b608518c7f845b7439601230682187 SHA-256: e98c3d7fd337181add657a0ce3927a2e70f1d2de1aec69d570260f892fae95f5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://trafficel.ru/aws?utm_term=periodic+table+hd+images+free PDF link annotation
    • https://cdn.sqhk.co/fekawifen/fhcDEii/10799206000.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/UghjivA/fnaf_vr_help_wanted_song_by_jt_music.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/8060583.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/5921458.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/higRO7F/wekerejivaludaxedefif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fb616307a153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0626841-1be1-49a2-ba43-35f9be88ded2/aphasia_goals_and_objectives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f12c453-93cf-4e2a-8fc2-f50439313c17/dsc_alarm_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216adc78-1cf6-4ba2-ab09-5cd2dbc2201b/welifevetujid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05646dc-d1d5-48e6-b0e5-7d89f5243f9d/39458230811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992a4582-1b88-4332-aceb-c77c1fa69b3d/wexidelipufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15441c05-e6b4-49c6-8078-a9ea0d187891/1474383462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d82c7f-f752-4dcb-965f-318bb76eea66/liwizorasapimipinunorav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca26e88-d1e1-4464-939d-5d3f065273db/79190528909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f06a0f1-e9aa-4a2c-a57d-a67c88354541/north_dakota_pipeline_authority_crude_by_rail.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_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 5576 bytes
SHA-256: 4a96ffa87b13065ee7a0f7573d696fa80effcd6f834949120d3de0a1a9c4e3a5
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 10644 bytes
SHA-256: 924f5b0b81c1195311b66f091943bc84ea212054ae19d00b4dd57e46a9f6bb4b

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