Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0cb1c1b09cce48…

MALICIOUS

PDF

67.9 KB Created: 2021-02-22 03:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bed6c6dc0858283b78bfed7211ef3d65 SHA-1: 2ed0922d616b28c11dca6e548b4305026ab88ea1 SHA-256: 3d0cb1c1b09cce48178bbb71532aac16c64a45126e62af169d7b6b5723b01705
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/wix?keyword=singer+stitch+sew+quick+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_6017cd03c9bb4.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/4c10cb9f6df546e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5ff20dd703695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425929/normal_601d126920725.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gjacBDb/bicycle_racing_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_5fd7d9116bffc.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/iahhTvE/74285792792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_60094bfaee6cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fd611ef113ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_601260d6667c5.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/dediviligirise_rumigisegado_gotefodepol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fee2e74bacce.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/jiwisi/mabajeda.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/cavernous_malformation_surgery_recovery_time.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/bncc_cincias_da_natureza.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_off0000ccd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD1 5596 bytes
SHA-256: 0564ab53bfa88971483ef4db7bec44454bec0c6883dc3e9ad6d0db1185cdbac3
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 10476 bytes
SHA-256: ed5259b21f9a97b85c0ab99a2b12e9235ecd9454c98f3242b0d5a064db0e5710

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