Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d7c5ee082b5162…

MALICIOUS

PDF

65.7 KB Created: 2021-02-15 12:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c25df67bc5db9197ae11d7d54feb6baf SHA-1: 5639be9d90d1b3189982ab7ed20ebcd8c5f0728d SHA-256: 42d7c5ee082b5162b4c19dd20410da5412465dea24928a960ac7ce24b4ed958b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=wing+chun+compendium+pdf+free+download In PDF document text
    • https://cdn.sqhk.co/xonivozew/jiSgfyM/92753619639.pdfIn PDF document text
    • http://lnstagramverifycentre.com/mrs_funny_bones_free_download3dxmr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5febeb677ca17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454438/normal_5fe3975496d43.pdfIn PDF document text
    • https://cdn.sqhk.co/lawotivu/gcSidJF/31525580103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_602669749f95f.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/hfpqRjg/photo_blender_mix_photos_online.pdfIn PDF document text
    • http://republvinb.fun/takaz4nvvj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413244/normal_5fc8466068ff3.pdfIn PDF document text
    • https://cdn.sqhk.co/viliwogid/iLsghhd/24529464321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_602109ea40b4c.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/ic6hio2/iron_man_mod_for_mcpe_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454042/normal_5ff196ee8aa4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_60297ad9f176c.pdfIn PDF document text
    • http://playmarket-online.com/42618244097gz60i.pdfIn PDF document text
    • http://myfirstsite.xyz/allianz_ovhc_insurance_claim_formjju4e.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/MGjhgcm/55544715029.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
    • 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_off0000c4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C2 5496 bytes
SHA-256: 81649d9400fbb39f2e8f6bd6af4788f5324a55fdc830ed22921aa84fd7b16083
font_01_sfnt_off0000d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 10120 bytes
SHA-256: 6c7b04fda0552e5094d21a7dd5b0fe40b3754723c0313e6b2c93973051429556