Malicious PDF — malware analysis report

Static analysis result for SHA-256 916e0550d03eb176…

MALICIOUS

PDF

75.6 KB Created: 2020-12-31 07:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae2dc4dd19e2c155b0ca002b88260e59 SHA-1: 791956c91ecc1b4f168aba00c2cf3da33a2f6c89 SHA-256: 916e0550d03eb1769066eaac848aef837248a19545fe36e9647076168ee71b80
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The primary URL, 'https://traffnew.ru/strik?utm_term=shelter+cove+ca+hotels', suggests a lure related to hotel searches. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

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://traffnew.ru/strik?utm_term=shelter+cove+ca+hotels PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5fd924bd25f1d.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/batexowabugiwefav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_5fbd618bc663d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5fa65775c28cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5fabc7d18fd2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fa1f4a15e7a7.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/ibnifjc/kemugasowovarilanolipos.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/Q9gjcid/baribudokuvibakod.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/6nDF8jj/white_wood_tripod_floor_lamp.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/retisovojor/vomanutasujagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212acb38-8ff9-435c-a261-3f627334a4d3/romujonagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1355c7-5b09-4de3-aa12-4b855962e95b/vienna_city_card_attractions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202af27e-fda2-40ba-93c5-a137cdb4b1a9/59122917868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b21a79-18b7-4f07-958b-d847255a7524/gavunejuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f116616-4047-41c0-ae57-a9a4b3084f05/viwixoruniligetofafezarob.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/free_resume_templates_for_freshers_free.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_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 5048 bytes
SHA-256: 3577628fc50145ea68101863bb048a8927444cbda604ccf14110b38ae3a7b859
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 10524 bytes
SHA-256: a81ffa7da867e878c53adeacee923b16ed6a07604a969d7ddeaaf0044d9ea8f6

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