Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17d0a19b054a8e7…

MALICIOUS

PDF

82.1 KB Created: 2021-03-07 13:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b666a793c1233f3b092efe6d03205460 SHA-1: 88cebb6f505d9851e5660248c45cf6af2e56307c SHA-256: c17d0a19b054a8e7ec00cfa46ff420a40a240b070ad3feb9e731e1246df4c31e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=lancelot+de+mole+tank+design In PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_60095c589fd8b.pdfIn PDF document text
    • http://razvivatel.blog/gabupunevatelizefog2t5a.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/fivonakojetojez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_6028c33809563.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/PgiGYkY/cyclobenzaprine_half_life_breastfeeding.pdfIn PDF document text
    • http://dezlice.ru/whatsapp_animated_status_video_tamil_song3yj5x.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/mixofepako-lujakivubenire-kexexesebekitug-judefip.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/hggjjj8/86045090777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423700/normal_5fe2857f51d5a.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/likazog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_601c88fed4cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5fd153bd4007b.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/dell_p2415q_macbook_pro_2019.pdfIn PDF document text
    • http://1xbet-registr.site/burejaniveligaderazellze6n.pdfIn PDF document text
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/ea75a8d9.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/322697.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/farming_simulator_15_money_cheat_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://darefobimig.epizy.com/carefusion_alaris_pc_guardrails_manual.pdfIn PDF document text
    • http://xuvatifovefad.epizy.com/safigijaxiribolekone.pdfIn PDF document text
    • http://lowazuxakosilal.epizy.com/33354686275.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 4956 bytes
SHA-256: e6075607ed426e2b893d7d3750f41991869e6855d8a0c5d7bb3c68ac29c85cd3
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 14684 bytes
SHA-256: f8cf39de3b0a752f43ce064afa361695c42f3f2239474a3a759601b28fb4da0a
font_02_sfnt_off00012ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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