Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1bac798509ed95…

MALICIOUS

PDF

84.2 KB Created: 2021-04-06 06:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 34ef456c48c7cc092710a6d0f4bc2b08 SHA-1: 618fdbf5c815c3a67ffec45e156245053ac42bf9 SHA-256: ff1bac798509ed9537b4b76ddbf66d6025e79dd748872218ac55b0f4b3bf1b6d
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector at 'https://yafferge.ru/strik?utm_term=peterbilt+389+radio+antenna'. The document body, though heavily obfuscated, appears to be related to the search term 'Peterbilt 389 radio antenna', suggesting a lure. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/strik?utm_term=peterbilt+389+radio+antenna In PDF document text
    • https://bojowavezuzabi.weebly.com/uploads/1/3/1/3/131382797/6938162.pdfIn PDF document text
    • https://sizokagijabid.weebly.com/uploads/1/3/4/6/134652394/jawunowe-dusodigivejofa-xevamejixekunod-balotevepope.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/notuzisadamim-kadate.pdfIn PDF document text
    • https://cdn.sqhk.co/nikapeke/dvnhbjb/24258685334.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/kBlvicN/lebara_mobile_store_near_me.pdfIn PDF document text
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/4ead20c10.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/hUig9ic/mass_from_sharepoint.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/hixgigh/super_bubble_recipe_without_glycerin.pdfIn PDF document text
    • https://nifazupu.weebly.com/uploads/1/3/4/5/134507595/tizasosubof.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/1358808.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://s3.amazonaws.com/lepefi/82569590884.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/77199422688.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/how_much_does_it_cost_to_replace_a_honda_odyssey_alternator.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/dopur.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/48241268404.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/xevubizusejonido.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/employee_availability_form_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/members_mark_pellet_smoker_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/35831564221.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/borgman_full_movie_480p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 5084 bytes
SHA-256: e864587212149381c4358d5b96f9567a0f9e9223ebddd83857fabf0d9c18becc
font_01_sfnt_off00011291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 10220 bytes
SHA-256: ef3149e99682ec137ecc927a0b06ad7e0d788e98970396c3d618048f10d0d2d8
font_02_sfnt_off000135a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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