Malicious PDF — malware analysis report

Static analysis result for SHA-256 c428068ace14a2fa…

MALICIOUS

PDF

78.2 KB Created: 2021-04-25 14:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 71f7fcc7da35ac3d17bd6c56aac6453a SHA-1: 14820d98d8a3339222ffb01dd2fb14706cc42d0c SHA-256: c428068ace14a2fa6f00ad836ef5572989f05d284004ed0025513abe327e997b
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to distribute malicious content. The embedded URL `https://pelibifir.ru/strik?utm_term=konica+minolta+c224e+ps+driver+mac` suggests a phishing lure related to printer drivers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=konica+minolta+c224e+ps+driver+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413240/normal_605c250999929.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/tenode.pdfIn PDF document text
    • http://nelolizavulejuj.medianewsonline.com/fundamentals_of_engineering_economic_analysis.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/5856426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_6011d44e4fde4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fda46dd6d6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_601b1ce5f0dc1.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/wudibirewuduto/bomogirujenixo.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/78093622387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8a6b65-c645-480c-abdc-99ab12df49bf/wordly_wise_3000_book_8_lesson_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c5466a-ea27-4ca5-aa91-d0a181152ab3/20987667968.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/14891922065.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/james_baldwin_academy_website.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/fun_activity_books_for_8_year_olds.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/52614905925.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/rebedusazaromugifi.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/gopexagiwubixafasogerofo.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/cqc_inspection_report_whipps_cross.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/2014_subaru_forester_maintenance_manual.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_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 5468 bytes
SHA-256: 9876587e72d2a5f4abba2b322f78e97dc1368477ae53c8cf33e088529d64a534
font_01_sfnt_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 11296 bytes
SHA-256: d931611f36a1267b5b6afaaddf5cd451972d5fa509190811f6d1f16928502547

Open this report in the interactive analyzer, or submit your own file for analysis.