Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fb700145df437e…

MALICIOUS

PDF

101.7 KB Created: 2021-01-10 11:34:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0d7277eed9be077521d0474ba9b6c4ef SHA-1: 79ef19a8e480ca5f0f82553705a47505d12f6896 SHA-256: d7fb700145df437ef735eb93963c154a34fccaa894d6438b8e16ccb63c878b19
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'trafftec.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

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/123?utm_term=surah+yasin+pdf PDF link annotation
    • https://jubuxazule.weebly.com/uploads/1/3/4/5/134585976/ce95b400db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f9c55597f557.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/geterizojijifu.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/jeturir-xiruxigepiril.pdfIn PDF document text
    • https://site-1176860.mozfiles.com/files/1176860/zonudirapakabefidaj.pdfIn PDF document text
    • https://site-1172860.mozfiles.com/files/1172860/highway_bike_rider_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/xghjdjf/jekegorixepovanazododowi.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/zawejejazi-tagen-gegoki-daropipapusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477916/normal_5fd34d8ec95f5.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/hbogf1b/bug_bite_thing_shark_tank.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/lakujusitejojet/dips_academy_linear_algebra_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/job_candidate_profile_template.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/tejevikekiliwezofinodivi.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/vshare_vip_free_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/53122806264.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/liwibijes.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001508b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1508B 31324 bytes
SHA-256: 118ad4c56510f5eee7db206995bd58b7db9aa3142cb49c538c6f8de38358ae13
font_00_sfnt_off00011b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B34 5304 bytes
SHA-256: bd56d930e9d011c863d79d806953103e314859101f398d32d0ddd914fd88226d
font_01_sfnt_off00012d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3F 10312 bytes
SHA-256: 0171c52d4672c17fa09a93edc5333b6164386339ab25405afaa71c9d453ebbe4

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