Malicious PDF — malware analysis report

Static analysis result for SHA-256 74479a01959641ce…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 04:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 78c3538f28d151f9cef136a05ea38cef SHA-1: 774c3d2c09a9048d6b3c525607d0ab58eb461ef8 SHA-256: 74479a01959641ce7d0f93ca9a342c5d2422775d3e290a23d82f1e140c2e6336
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a phishing or malware distribution attempt. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=murloc+rpg+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5ff7a9992c081.pdfIn PDF document text
    • http://bnl-jobs.com/how_to_get_ikea_cataloguew221d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403128/normal_5fe3f6253ac6d.pdfIn PDF document text
    • http://intereriia.com/20433183277rqxeq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_600299e222563.pdfIn PDF document text
    • http://mazezoda.22web.org/jiwen.pdfIn PDF document text
    • http://fabimepela.22web.org/batman_arkham_asylum_free_pc.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/gojejo.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/74136949074y69r4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5fc627995fa3c.pdfIn PDF document text
    • http://yogist.fun/16357264011zih7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danijikuguwidak.rf.gd/oceans_hillsong_united_violin_sheet_music.pdfIn PDF document text
    • http://burabovedi.rf.gd/37440777999.pdfIn PDF document text
    • http://nipovowegase.rf.gd/nixon_ceramic_player_swiss_automatic_black.pdfIn PDF document text
    • http://kuwukazisopof.rf.gd/4488508510.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/21280043207.pdfIn PDF document text
    • http://dopoval.epizy.com/in_computer_full_form_of_pps.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_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 4852 bytes
SHA-256: 3c77cc439fd961866527642452c08a34419787d69821cbfd73d6b0332bae5b2d
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 10504 bytes
SHA-256: 32cc3fab4e00cc9994a24db91bfeccc58ad25022f5e75e4e917bee292b3fa7ae

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