Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66dd8c63b5e34f1…

MALICIOUS

PDF

75.1 KB Created: 2021-01-01 14:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245bcb78b0666adacf7039117c213fa1 SHA-1: 7d5db174368b8d4d46a2d1936508aa58b92ce112 SHA-256: c66dd8c63b5e34f18ddf060ca83acb41a0974e7223cf458ea87353e9051812db
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=allstays+camping+app+for+android
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/kalowemixuluted_vanosu_banapaz_mixarunugabudi.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5fabded136b06.pdf
    • https://static.s123-cdn-static.com/uploads/4472788/normal_5fc3fed2b8bf9.pdf
    • https://cdn.sqhk.co/lejukujegomi/higihaz/geometry_dash_subzero_pc_download.pdf
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/laromixijowapobosab.pdf
    • https://cdn-cms.f-static.net/uploads/4484380/normal_5fd5f0e919e0b.pdf
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fe554d2d2afe.pdf
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fc1299049b98.pdf
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fd38e4287b6f.pdf
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5fe9e00b4dac2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zepifudoxapo/new_york_times_crossword_monday_answers.pdf
    • https://s3.amazonaws.com/setaxilitozuko/cabal_abandoned_city_dungeon_guide.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/94519429525.pdf
    • https://s3.amazonaws.com/fekaduvopigab/adulteration_of_food.pdf
    • https://s3.amazonaws.com/tudawufed/osrs_dark_manuscript_runelite.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0e.bin
7a8c25657a9a6251b5b02f40fe8fa331f56d8c9c4a89206967fdc9efdb5dc053
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 5236 bytes
font_01_sfnt_off0000ecc1.bin
c3644eadb8349637129329475dc57d0213a1572e5baedc9cc16a4b4d18838459
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 10820 bytes
font_02_sfnt_off00011197.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x11197 4324 bytes