Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bacdebb98bc8efc…

MALICIOUS

PDF

67.3 KB Created: 2021-01-08 17:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b3e64406cd91f8f079d9e073b8b70f56 SHA-1: 161128ce0a9857f0e066f98aaa73498e72c1389f SHA-256: 4bacdebb98bc8efc173f19ee71877187562402fc222e40fd52fbaa56c50ca710
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure or link farms designed to obscure the final destination. The document body, though heavily obfuscated, appears to be a lure related to a product search. The presence of multiple malicious links and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://traffking.ru/123?utm_term=samsung+42+inch+tv+power+cord In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f874357b94ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f9e551a981f6.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/livudapafigozimilom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498645/normal_5fe07638a62e9.pdfIn PDF document text
    • https://lovevisop.weebly.com/uploads/1/3/1/4/131410094/0169a076.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/vugodasisagub-pebeponeb-wuzoxilodufolum-papetawezabo.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://uploads.strikinglycdn.com/files/c544d5ad-06f9-46ac-86bd-f49f481cbf6b/28475125547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2243cb01-f9ea-49dd-bdcd-342c16dc3dd7/pokemon_stealth_rock_users.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/18371166542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5107dfab-6090-4b54-a78a-d060337f53f9/the_forbidden_riff_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2354041c-5ef2-4014-9840-7b09a85f0572/dexibazorawasiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff4c2f8-2766-4d79-8aee-8d6c78e95e9f/5094764318.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_off0000bc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2A 5812 bytes
SHA-256: ad35ed59f794d97b72bed94514561b53c17e7a1266dcc35aaf9ed1261915ff86
font_01_sfnt_off0000cfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD7 9792 bytes
SHA-256: e2f626a4f01f7b3b0d8b8da6217a03d1f93bfb98d72a6ee8075b0748f8318e9d
font_02_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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