Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efcd77403e48df6…

MALICIOUS

PDF

65.7 KB Created: 2020-11-25 23:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3b4acc15179b18d44e8b0618c68ad055 SHA-1: 3ab0f2a29e52636cf8a61fa30e015b7601d921bb SHA-256: 6efcd77403e48df653297d9cac7b50a043445a41d12e362c26b037cbb233c979
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one pointing to 'trafftec.ru', suggesting an attempt to redirect the user to a potentially harmful site. The PDF structure and embedded links indicate a likely phishing or malware distribution attempt.

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://trafftec.ru/123?utm_term=a+diverging+lens+produces+an+image+of+a+real+object+that+is PDF link annotation
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/1916663.pdfIn PDF document text
    • https://gibonubud.weebly.com/uploads/1/3/4/8/134877094/likuvotam.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/fadedosi/chinese_bus_schedule_from_schenectady_to_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/torrent_apk_download_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/sefiwewejem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc014ad2-c80b-4dcc-91a7-2941e3f2d6bb/google_play_services_apk_11.5.0.9_230.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/usb_loader_gx_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bosch_battery_lawn_mower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/13208295155.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/mivugorikot.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/92468426639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511265c3-0419-4633-b9e3-b1fae7d8b05a/dosiwizevu.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_off0000c45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45B 5836 bytes
SHA-256: ad252f814292a06dda1ad6ed37aa6831798cd104e971e5ecd068bc3acbb629e1
font_01_sfnt_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 9948 bytes
SHA-256: 9b20d9ed219044af96c934a3039f52cd4b97ec6a45781c97915124e00613017b

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