Malicious PDF — malware analysis report

Static analysis result for SHA-256 7164488961816b10…

MALICIOUS

PDF

120.8 KB Created: 2021-04-24 16:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cbcb3c7a1f1e5f93944a7aa20faaf335 SHA-1: 21640db80e9f53a275bc11168d693662334577b4 SHA-256: 7164488961816b1080a3a33a26960acd7feeff24b067bc0a079e1e0f7d38fdb4
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to "League of Legends ph patch schedule" and the wkhtmltopdf tool, indicating a potential lure for users interested in gaming information. The presence of a ML classifier flagging it as malicious and ClamAV detection further supports its malicious nature, likely serving as a dropper or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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://mezovuduw.ru/strik?utm_term=league+of+legends+ph+patch+schedule PDF link annotation
    • https://cdn.sqhk.co/levowexesu/Lq7jdge/renegade_racing_game_hacked.pdfIn PDF document text
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/dukitosusegutifuzib.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/7357002.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/Egje3ha/3d_platformer_super_bear_adventure.pdfIn PDF document text
    • https://cdn.sqhk.co/lilovenodi/b0libjf/30416821011.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/A0Ngeib/96007138970.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/jivajdg/48417978221.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/VIojegi/consumer_reports_trackid_sp-_006.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/eflicWV/80165180999.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/jiahc9s/xekisaxogusozozizeludiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/2hiifiO/divaris_real_estate_zoominfo.pdfIn PDF document text
    • https://nugiwilog.weebly.com/uploads/1/3/1/3/131384260/tenivebujawaxu_dugilesixabifo_ronatalegudi.pdfIn PDF document text
    • https://siroxexorap.weebly.com/uploads/1/3/0/7/130739693/sigavupijoza.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/wixatax/lojunejujojizosunozik.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_7e35444a2103499ea0a553cf5a5d3acb.pdf?index=trueIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_8bccbb46d06f459caf525028835cd803.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/4726533673.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/54620417111.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/vizio_sound_bar_5.1_pairing_subwoofer.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_off00019bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BB6 5260 bytes
SHA-256: 3e6191a49b777d56efa9ad8b79559efe8dd06274ad31c31667582abbe2132f2d
font_01_sfnt_off0001adaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADAA 11992 bytes
SHA-256: 908c8d92d9d61caf047fad26e9fb4452d66cc717b192892af5f2bce9b4a07ef1