Malicious PDF — malware analysis report

Static analysis result for SHA-256 861ed1d0cbf7a4d3…

MALICIOUS

PDF

68.2 KB Created: 2020-12-22 00:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d56c175851ed899c26898f552d866d02 SHA-1: 42c42ff7c763466089144286112d36e262b06d5f SHA-256: 861ed1d0cbf7a4d3af5fc48a4ed4619bb892dc21e84bc0e79752e328fb1b2dc2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'application form'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate 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://trafftec.ru/aws?utm_term=new+pan+card+offline+application+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f8da3e20d078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fc6bed6dfb3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5fc0f80b467a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fe02f967ba1bc1885a2a271/t/5fe1204fd46f1425c751f227/1608589391984/osha_flammable_and_combustible_liquids_fact_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13e7dd49dd12447366960/t/5fc632ad9d79364840605107/1606824622324/top_club_songs_2019_rap.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/chabahar_port.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/64164671354.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/vaccination_schedule_for_broilers_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/7311847483.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/weighmax_scale_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/balika_vadhu_ki_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba434f8f-a444-431c-96e2-615172ed3585/digital_health_and_wellness_fun_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/tebowuzeraveva.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_off0000cfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBB 5184 bytes
SHA-256: 6dd38c399e694b4f06ac2a054871ead927c77c14d627733f5e58c124b6229ffc
font_01_sfnt_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 10084 bytes
SHA-256: 13abf4fe2b5a481c47eeb7817545dda1e34e4eac22262e77004ca4ebe5aa2fe8

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