Malicious PDF — malware analysis report

Static analysis result for SHA-256 489460e58d3e3159…

MALICIOUS

PDF

66.7 KB Created: 2020-11-14 06:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9f2de2cb137bb4cebddceea233a30e88 SHA-1: b3325b8d5ea91eeb8ddc6e594e0586c8f7f52331 SHA-256: 489460e58d3e315986fbf9daeef7efa97ed005b31290a4ed8d2b287859be9287
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one pointing to a suspicious domain 'trafficel.ru' and another to a PDF file on AWS S3, suggesting it's part of a link farm or distribution network. The document body, though heavily obfuscated, appears to reference a 'personal assistant job description uk', a common lure for phishing attacks.

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://trafficel.ru/123?utm_term=personal+assistant+job+description+uk PDF link annotation
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/gikekivipev_rilatapoliliz_toxufotufa_zusovuxeseneji.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/pedokeza/takarufogebetuzarimowof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6ac25e-8d62-4e42-b44a-f7d39bd11f6b/yahoo_mail_pop_settings_outlook_2003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc75463e-79b6-4665-9e22-1e245d377a55/bomewesi.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/jivotudufikoso.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/2234254687.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/buvogazigidosepur.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/chapter_7_cisco_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8bdf14-330e-4c3e-9f1c-7fdb084423d5/xufotatenufaman.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/fine_arts_center_brigham_city_utah.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/new_wedding_dresses_images.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/xubalu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/the_babysitters_club_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/web_archive_format_to.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/counting_stars_violin_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/outline_format_for_notes_examples.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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5348 bytes
SHA-256: 496ebabcc9f49b828c73c9245fae3b01a8c5cff1c30510e38eb407650bcb77ec
font_01_sfnt_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 10048 bytes
SHA-256: f43cab52c3e3aced2a148e414a24698d1ef021582698c4750f80c7426445be2d

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