Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2b01ea73e93ad1…

MALICIOUS

PDF

75.3 KB Created: 2020-12-02 02:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c9100e17fb96c285d662d378187484e5 SHA-1: e6c6839addf6266f9594c22d9f185c13b3c85369 SHA-256: 7a2b01ea73e93ad1a70b98f13a69c2ff90ccc76fa29046234244d635d07780c5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain ('trafffe.ru'). ClamAV and ML classifiers flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=bluetooth+tv+transmitter+for+hearing+aids PDF link annotation
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/2a5f9.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/5fc173ecdf132613bbc1a931/t/5fc5763f5147b14804ebd985/1606776384695/dnd_5e_longbow_damage_bonus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fc672d164571256541a526b/1606841041758/62571262796.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/iolite_jewelry_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206eb558-5c2d-40f3-af7b-7d215a76f8de/how_to_mobile_legends_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc29eb461e25426e18d5243/1606590137230/sanenexokorifo.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/permanent_accounts_would_not_include.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07eb0ad-a1dc-4eaa-9553-52eb4e3e33ec/vevudesovemobadiwofetikuk.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/parse_error_on_kindle_fire_hd_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844c0b8a-568b-4c54-9754-1999f96d9dab/91010823841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9532b125-9871-410a-a2af-9561fe0d7d26/lifitemoxewakidotijaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727f901e-96c4-452d-b134-4ece3369fe71/lozulusufajajatexopo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63a07acac6192ab8d834/1606378400457/westwood_middle_school_science_fair_packet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c17b68-156d-4123-bf6f-2ee0f81c742a/gateway_lx_6810.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_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 5432 bytes
SHA-256: b2d640cf28f0017d8c674c73d5d61dd8aaeb5078dabafd29de320afe70e7ddf7
font_01_sfnt_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 10544 bytes
SHA-256: 223d2d58a84eaf4d018a9eebef9ea89bcb00e1e197f2c9787ffb9740c721b722

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