Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b479eaebcf9108…

MALICIOUS

PDF

75.5 KB Created: 2021-04-19 02:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a63cfa5ba821ef93dcb492af9e7cf9b SHA-1: ebd9f5281e342cc8ae2fe817275f6277fb7cfcaf SHA-256: f6b479eaebcf9108aee15f558963df8c7286126574f713cd9603543efb131308
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF_URI heuristic suggests the document is designed to trick users into visiting a malicious URL, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=diary+of+a+wimpy+kid+the+long+haul+movie+trailer
    • http://bapadama.medianewsonline.com/12292068090.pdf
    • https://cdn.sqhk.co/ravuviwidi/rgiy70t/sibib.pdf
    • https://cdn.sqhk.co/rowagana/gMjfiec/10798703710.pdf
    • http://jajuviramigawo.medianewsonline.com/bunotoledaboguxitolot.pdf
    • http://vegofejolafud.mygamesonline.org/65516249922.pdf
    • https://cdn.sqhk.co/kowumutajaw/tGjabje/stick_stunt_biker_game_download.pdf
    • http://repizedozoful.sportsontheweb.net/3051430056.pdf
    • https://cdn.sqhk.co/zenetofuma/jaYiiia/94550882306.pdf
    • http://zimezobot.getenjoyment.net/74910960542.pdf
    • https://cdn.sqhk.co/vixuzemabad/jggeigh/fruit_dash_mod_apk_android_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wegugoleta.onlinewebshop.net/what_mecha_anime_should_i_watch.pdf
    • http://wojibikifi.myartsonline.com/40995512468.pdf
    • https://s3.amazonaws.com/fowikorejodi/71146139479.pdf
    • http://kibomopog.rf.gd/vaganaxibawukam.pdf
    • https://uploads.strikinglycdn.com/files/3f41a068-f307-4894-a467-7d3a64aaca29/mozamafukelig.pdf
    • https://uploads.strikinglycdn.com/files/efa8d855-ae99-436f-be1f-476c78b848e7/how_to_apply_for_michigan_medicaid.pdf
    • https://s3.amazonaws.com/tesasubawalozan/40804359896.pdf
    • https://uploads.strikinglycdn.com/files/4409c28a-57c7-4d21-9ab8-5d65843ad230/91231535549.pdf
    • http://bakajejupuxa.epizy.com/29851153373.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e998.bin
7d54a9d0985d497236f86507f35872c7595ca5bfcff712dcf134ccdcf1f4fd7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 5592 bytes
font_01_sfnt_off0000fca6.bin
4bfdf48bfa375e242362f7d8153c42fafe4286a8d06b086969d2c6b2a2b8106e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 10568 bytes