Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c843144adca00f…

MALICIOUS

PDF

66.9 KB Created: 2021-02-19 05:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f89794c9bdb99bf02d2f820e94629b2e SHA-1: 33f074e5ed017d3dedba2dada961b2470c574bf4 SHA-256: 21c843144adca00f104156216a5cf284c4134df6ab5ac648d9cf639a80bb745f
146 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=solutions+manual+for+organic+chemistry+9th+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370286/normal_6001d2410f3a7.pdfIn PDF document text
    • http://itali-big.space/find_out_zombie_hospital_walkthroughz8apq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_60109b6076626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fccfc3c614d2.pdfIn PDF document text
    • http://tovelksa.website/gmp_guidelines_for_quality_controlulri3.pdfIn PDF document text
    • http://yazansoft.com/xeteweterewimzfic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5fdffcb806893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_601d061af140c.pdfIn PDF document text
    • http://my-favshop.online/java_for_minecraft_serveramby7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_600f7899a93d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369763/normal_5ff34369ee1d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5fd7b6e2c6b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_60135c8173651.pdfIn PDF document text
    • http://medyayazilimtr.com/consumer_reports_used_cars_2017wbv2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_601b0781f319f.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/godewumazek/best_free_zip_album_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/sariregiduvene.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/cheetah_keyboard_3d_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/nier_gestalt_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/43570251663.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_off0000c7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C8 5796 bytes
SHA-256: 55f3f16388d454cf5dfb56c7109fe5c875e19d49a92728cdcfb205e4046c671d
font_01_sfnt_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 10160 bytes
SHA-256: d3f7ff863fa8915ffd1ea11faeab27631a4e883d4115d95eb4b782560bf3e785

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