Malicious PDF — malware analysis report

Static analysis result for SHA-256 037ad0b607eaa770…

MALICIOUS

PDF

99.9 KB Created: 2021-03-21 06:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e0084d73bf8acd3aa7da5f18336ea46f SHA-1: cf01552ebe9bd686958636d7b3258ce160de2b1a SHA-256: 037ad0b607eaa7705b58b0ad3eb2e5da93fff8040c08299b191511f70cc8fc51
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous external URLs that point to other PDFs, likely for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites, possibly as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/award?keyword=approach+to+anemia+in+pediatrics+pdf PDF link annotation
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/sotuxurawemowafefile.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/e26jiyb/tadiroxamatiluresi.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/dhjfFih/668040258.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/khbeAib/92169307337.pdfIn PDF document text
    • https://lasogevedona.weebly.com/uploads/1/3/1/3/131398076/wefidinowurobug_ronikoxirinek.pdfIn PDF document text
    • http://5coupon.info/2005_cts_v_autocrossxo2ch.pdfIn PDF document text
    • https://gusumumonabol.weebly.com/uploads/1/3/0/7/130775475/kekege-tawefol.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/jdiggfS/complete_math_smart_7.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/zazabo_mugemifisutobeb.pdfIn PDF document text
    • https://koxokigibobov.weebly.com/uploads/1/3/4/6/134600250/e868c7eca2.pdfIn PDF document text
    • https://lasuresupaka.weebly.com/uploads/1/3/2/6/132683400/rifibutarifiju-mewagifiz-xulofupoludo-dakiduvijile.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/9574117.pdfIn PDF document text
    • https://guvavibigedufos.weebly.com/uploads/1/3/4/8/134855984/fefadusu_gaborazinubali.pdfIn PDF document text
    • https://cdn.sqhk.co/bamewimoxatu/uOmBjem/up_all_space_jump_casual_arcade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/icMqgc0/space_frontier_2_mod_apk_android_1.pdfIn PDF document text
    • http://luminar4-download.xyz/558215836911mniv.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/gfFDjbt/21174567778.pdfIn PDF document text
    • https://zavitakeji.weebly.com/uploads/1/3/4/9/134904790/4348936.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/jbOWaG8/capture_the_flag_video_game_online.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
    • https://673fcb93-492a-40d1-a7cc-77260b5c7816.filesusr.com/ugd/62d21a_9426015d28e4456a9816512be46ed7f3.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_817923b34a004671951e2dc17c8cf678.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_4b814d8fd1b3416d83da8b396cc0b17b.pdf?index=trueIn 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_off000139f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F6 5140 bytes
SHA-256: 4a3849a0f1d0c1175a49559f62b3989028109cc95d837397947c24101c2db3b0
font_01_sfnt_off00014b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B35 11980 bytes
SHA-256: 0904a231688b4ba7295f5efe7bf0c89bcadfe7c6cbe04cde6054bce664cbc4bf
font_02_sfnt_off000173f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2