Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cd8134b59ab13c…

MALICIOUS

PDF

65.7 KB Created: 2021-03-05 00:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cb29be774dc04c8021d0b962682da4be SHA-1: 2799165a7d9dbcfc1ac4a745e516f99b71db1a9e SHA-256: c5cd8134b59ab13c8f8d891d2b9b24716cd2fea5d64e75bbf6aace7c503af85c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/award?keyword=your+grace+is+enough+chris+tomlin+chords In PDF document text
    • https://jaxizunup.weebly.com/uploads/1/3/4/8/134885867/9397618.pdfIn PDF document text
    • https://kodusikur.weebly.com/uploads/1/3/1/6/131606179/lupowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff110bc7bf34.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/65hiGz6/6636391300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_5fe430acec52f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459188/normal_5ffe0a8d1e55f.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/h8FhcBF/manevafezesawamosoduj.pdfIn PDF document text
    • https://cdn.sqhk.co/bigokukanuf/ZWibpjf/recharge_a_cuba_por_ding.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/egcApkn/eliteone_800_g1.pdfIn PDF document text
    • https://zafatuxowusetex.weebly.com/uploads/1/3/0/7/130739053/fosagekubowekep-sanukol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_6015bd6525d61.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/35750166243.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/c8c2c06914e.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/wupiwupiwot/brand_marketing_strategy_template.pdfIn PDF document text
    • http://zufelagek.rf.gd/selebigavaloxidanofejazul.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/govuduxiwegox.pdfIn PDF document text
    • http://piserujirabubam.epizy.com/dota_auto_chess_guide_mage.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/answer_love_myself_lirik_indo.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/how_to_do_smooth_texture_ceiling.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/60101363635.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_off0000c469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC469 5312 bytes
SHA-256: 3428d6fb84c438d11f7a0d4e0b5d8ac108eec34e9f596f86290e2192490a6034
font_01_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 10244 bytes
SHA-256: 7d27e4df0bad2d766a356d603ebed7beb67fae88e54c67e6623f449188501c37

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