Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf696fbfb753a62f…

MALICIOUS

PDF

68.0 KB Created: 2021-04-08 12:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2450e7445f2a25af67d333518df4e3d1 SHA-1: cfc13629b77a20938e8627b4421c9f4f3e59576b SHA-256: bf696fbfb753a62f5785b5b06fa3b531d6afd8d4b91629e0217e824a81e1db95
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=how+do+i+start+a+movie+review+blog PDF link annotation
    • http://bobr.space/dugujujudaxi0n6cx.pdfIn PDF document text
    • https://kepefiporewe.weebly.com/uploads/1/3/4/7/134704647/b861bea.pdfIn PDF document text
    • http://tokio-2020.fun/ryobi_10_table_saw_replacement_partsdjedz.pdfIn PDF document text
    • https://sagupegijugix.weebly.com/uploads/1/3/4/4/134443219/1136545.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/2366374.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/rubumigenit_levat_buxam.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/2613408.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/vepelaruvuj-sosoxuxurule-gufaxomakofip-gonizarak.pdfIn PDF document text
    • http://tikovg.xyz/9355916771223tcu.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/69dace6a5a509.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/nejugupelikumaz_maxakofa.pdfIn PDF document text
    • http://robinmani.site/what_do_you_need_to_be_a_lift_technicianiyvi3.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/xidazeze/drunken_wrestlers_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/15797133143.pdfIn PDF document text
    • http://mexuzasapasi.rf.gd/xfinity_voice_remote_setup_button.pdfIn PDF document text
    • http://xurebamokasepa.epizy.com/honda_rebel_1100_release_date_australia.pdfIn PDF document text
    • http://runukelagav.epizy.com/biology_notes_class_11th.pdfIn PDF document text
    • http://rapodipowunifo.epizy.com/building_maintenance_manager_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/bluetooth_audio_device_windows_8._1.pdfIn PDF document text
    • http://xeletimozod.rf.gd/blue_bells_of_scotland_trumpet.pdfIn PDF document text
    • http://lolefijulakemi.rf.gd/mojadewed.pdfIn PDF document text
    • http://xelidev.rf.gd/50736928500.pdfIn PDF document text
    • http://tuxusajef.rf.gd/39300780797.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/dafivijunizedawitaferaben.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_off0000ce62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE62 5400 bytes
SHA-256: 7a86086524c65fa18cb316d99c378271f9f6195b04afbf1bcfb6813b5ed77bb6
font_01_sfnt_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 9928 bytes
SHA-256: 95595eb3eb28f45c6967703d1a40fe6241ee51585733b72c81a73d169c2d63f2