Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c7c563b6a242ef…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 05:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ad918e0841e09aac65e48e6b11d9fa6e SHA-1: 34f3c661aa0f9caef96f5e06f3737c745276c0d4 SHA-256: f0c7c563b6a242efcbe14b106020320fcbdf06c8e9248a525a17a3b6db54ac31
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of a link farm, containing numerous external links, many of which point to disposable hosting services. Heuristics indicate these links are likely malicious redirectors or part of a SEO manipulation scheme. ClamAV detection and ML classification further support its malicious nature, suggesting it's designed to lure users to potentially harmful content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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=rukmini+swayamvar+book+in+english+pdf In PDF document text
    • https://zijovegumasapal.weebly.com/uploads/1/3/4/3/134307166/2179496.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/c8ac0587.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/7556417.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/gimefurej-tajukifez-xosunudorekisid-ponuvunenavi.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/f9Ic2Su/world_war_2_movies_list.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/h0kmgcl/maze_game_horror_prank_free_download.pdfIn PDF document text
    • https://milevewon.weebly.com/uploads/1/3/4/0/134041257/6523664.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/nugujowozixonew_rukibu.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/2139782.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/ghbjdkV/marvel_comics_online_free_download.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/c4e52bdd41.pdfIn PDF document text
    • https://jokosofaka.weebly.com/uploads/1/3/4/4/134436044/4639748.pdfIn PDF document text
    • https://felilediwifagid.weebly.com/uploads/1/3/1/4/131453780/f55a96e.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/5765891.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/0icqcjh/game_ninja_and_zombies_mod_apk_unlimited_money.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/21372485577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c454923-d96a-4611-83cd-e91a134f89be/xedixaserarakux.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/bose_901_series_vi_owners_manual.pdfIn PDF document text
    • http://biwefejiza.myartsonline.com/swot_analysis_strengths_weaknesses_opportunities_threats_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4f2a77-3440-4379-a229-30ede3e0da27/are_boss_audio_stereos_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48948e0d-1cd2-4f49-9c9d-adfe653a5d14/writing_prompts_for_esl_students.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/passport_application_form_ds_11.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_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5920 bytes
SHA-256: 3fddd17a8c307626d35bcd014b0da1d7d275904b60c39724427812ef62be67a0
font_01_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 13256 bytes
SHA-256: c232e582d4e5a33b1ff4f9f2b60995028263a756fad60a88adb41991989665a3