Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f33ec99b9df865…

MALICIOUS

PDF

69.8 KB Created: 2021-01-19 17:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 26e8195d9e160f50c3db8e63671984cb SHA-1: 8cd70ccd92ac161a1b8ce521f8b0c33c0e4323fa SHA-256: a1f33ec99b9df86551957c4ee6ac012a263496b9697377f752776a319d6ef72d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 and a machine learning classifier. It contains an embedded URI pointing to 'https://traffking.ru/aws?utm_term=headway+plus+elementary+writing+guide', which is highly suspicious. The document body is heavily obfuscated, but the presence of the malicious URL and the detection signatures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=headway+plus+elementary+writing+guide PDF link annotation
    • https://cdn.sqhk.co/wuzufoxo/cahcmgi/color_flippers_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/ihfjhge/63076069811.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/igyhfEC/packers_bears_game_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/gcmha6Z/flow_easy_topup_jamaica_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5fca5df969dab.pdfIn PDF document text
    • https://site-1249262.mozfiles.com/files/1249262/91573573071.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/hfhgObb/65163774775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc7ffcb9fe44.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/icsQhbx/rugugina.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/cpYhams/sweet_princess_hair_salon_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/dqiebjg/sizonos.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/idghfjf/hockey_monkey_denver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_5fa0c159d18b5.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/juzinaramip/microsoft_sql_server_management_studio_format_sql.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bachna_ae_haseeno_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/75614043924.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/56793619802.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/c_street_surf_report_magic_seaweed.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23B 5436 bytes
SHA-256: 4c30a3c14ef43275e611b093538d087857c93502cf730ec3f87f72cb812324ba
font_01_sfnt_off0000e4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 10872 bytes
SHA-256: d40bfe362c54f33f426dfedb9ed42777f19f41cb203741e4feeaa58cf551e3e4

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