Malicious PDF — malware analysis report

Static analysis result for SHA-256 5121511b0012a5d9…

MALICIOUS

PDF

68.7 KB Created: 2020-12-31 14:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4da90fa7eb4a395f8111ebeeb25ab024 SHA-1: b59ba729b1adfbbd183e3de1848acc090a29957a SHA-256: 5121511b0012a5d91e6cae01c29ce423569f7a44dd500fe30c692d9f6dbbcfe6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely serving as a lure or a download source for further malicious activity. The document body, though heavily obfuscated, suggests a 'checklist' theme, which is a common social engineering tactic.

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://traffnew.ru/123?utm_term=oci+document+checklist+ckgs+for+minor PDF link annotation
    • https://cdn.sqhk.co/dajebala/fMpgigf/dagonukuwizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_5fa2a56de1000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_5fa60ba0ce930.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/cghdHbh/play_zombie_shooter_games_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_5fe99b53ac797.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/BAggobx/photo_editor_collage_maker_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f916f673babe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_5fbf51864c465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fbf30a8e0227.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/dnolick/remaining_epl_fixtures_for_liverpool_and_man_city.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_5fb8632331676.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/jahfij9/grandpa_gifts_from_granddaughter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_5fc4cdc564622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fd9abadde611.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/eXKShiB/cartoon_cat_call_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/fhgihih/weritomenafaxejewuxijamun.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/jiHhblW/kefikesafazetipidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 5316 bytes
SHA-256: 68a6fbf55c53a4a52cc0ce08663d05380f42554065cc4114471cc1ad8b80801c
font_01_sfnt_off0000e390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE390 10156 bytes
SHA-256: 7b4a842e3c55d1ad0155f6ead5aae7c5c3b9e6b5a8c78e3791dcb94c4968cd18

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