Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c6fd8c57e87261…

MALICIOUS

PDF

84.2 KB Created: 2021-02-12 07:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d6a49ab10afac121f8b330c86d08dcf0 SHA-1: 97ba3a79013ed2312e4b03fa6e34a7b514c3be06 SHA-256: b2c6fd8c57e8726154e79e6a135193b55f317f750a747ed5580edb001f1d96d4
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=local+channels+guide+for+lubbock In PDF document text
    • https://cdn.sqhk.co/tuwagezo/SpJjf4E/fimopavusuwaturadubat.pdfIn PDF document text
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/webukuzowubanu_sugewozon_lebibekufori.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/skull_trumpet_sound_effect.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/tojubilenetewe-mabevusanawo-gamixoneki-bafar.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/kogosometowepofejole.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/nRIhirT/intermittent_fasting_low_blood_sugar.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/hih8ijW/57757880075.pdfIn PDF document text
    • http://genonaxeti.22web.org/genymotion_not_showing_in_android_studio_3.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/ahgghQh/muzupaxoreturiwivu.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/vuxalirudidel/muscular_system_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/list_of_awards_2018.pdfIn PDF document text
    • http://xuletesowugi.epizy.com/87008568083.pdfIn PDF document text
    • http://tukudapig.epizy.com/tv_serial_full_episode_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/worship_songs_2018_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/97671806531.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_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 5428 bytes
SHA-256: bfdcb7fae5aa57657ab8f61ddf3be9ef797152bec541653e096471ba86049956
font_01_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 10928 bytes
SHA-256: 099e0e4fcb2f55ef300a709c028a38a5bb92a106c12c4bf0510498b0b6c35f65