Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2346e8657f541b…

MALICIOUS

PDF

73.9 KB Created: 2021-01-11 23:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0198f0458352c2877d02ff6b77f0c914 SHA-1: 56ba2adf77c510117592c78d5989bcfb3d068c80 SHA-256: 5d2346e8657f541bd765fd0892032caa16a7cb2f458f06359f9f9724f38339fb
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to benign content, but one key URL, 'https://trafftec.ru/aws?utm_term=cabal+online+mobile', is associated with a phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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
  • 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://trafftec.ru/aws?utm_term=cabal+online+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fabc05358502.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/f1a298868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_5fa057373cd47.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/jenisozazewubo/counting_numbers_1_to_100_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/jaridat_al_nahar.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/radarscope_apk_patched.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/73929799322.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/roblox_got_talent_piano_sheets_coffin_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/97937058023.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/anaerobic_digestion_of_food_waste.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/feats_for_swashbuckler_pathfinder.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 4428 bytes
SHA-256: cbbfb9ef99ec97f453e0a589d71f16423f27db8bbb8c896f61ebe532df415294
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10064 bytes
SHA-256: 4844943d00c164bb6b7426615447034a7f3721ac643bde6adbf5b3e0d584db96
font_02_sfnt_off00010cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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