Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f9c99ee3686ed7…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 02:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e90001bf973c483b02c58f0c66060c0 SHA-1: 7b7e879a01e88560b2ed04defa202e7c0a87fb01 SHA-256: 25f9c99ee3686ed7d21bb14a06308c73ac6588f2f0ef7736d1ad04484b4d6230
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains multiple embedded URLs, one of which is directly associated with an award notification lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious sites for further compromise.

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://kuzutuzo.ru/award?keyword=bioconversion+technology+pdf
    • http://boviriso.22web.org/aladdin_monitor_installer.pdf
    • https://cdn.sqhk.co/fefowofuk/hhcicVl/22436381293.pdf
    • https://cdn.sqhk.co/febowozefu/iagd9hd/11035067579.pdf
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5ff6d3d517329.pdf
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc612b2970d5.pdf
    • https://cdn.sqhk.co/xasakeza/ib6hfEb/tidiripilefuruzan.pdf
    • http://gofidiva.iblogger.org/90985365572.pdf
    • http://wavarev.22web.org/18168863506.pdf
    • https://cdn.sqhk.co/mibajufaneja/W7aTLJ0/best_80s_music_playlist_youtube.pdf
    • https://cdn.sqhk.co/badimoweba/Dhhgfja/75677870255.pdf
    • https://cdn.sqhk.co/talokelom/a9ujaOp/41497427703.pdf
    • https://cdn.sqhk.co/beratinuga/lImgfYr/unicorn_hot_chocolate_dream_food_makers.pdf
    • https://cdn.sqhk.co/pategazikiw/dMMFidC/find_my_friends_iphone_11_app.pdf
    • https://cdn.sqhk.co/vimerokil/dDsidjg/spongebob_adventure_games_online_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zesinule.rf.gd/semalezemuxena.pdf
    • http://rumelitakelu.rf.gd/37578806115.pdf
    • http://zuvodokisezimim.rf.gd/hisense_air_conditioner_window_kit_e5.pdf
    • http://punipovudipani.rf.gd/curso_de_violo_classico.pdf
    • http://jemoxojuv.epizy.com/beginner_bodybuilding_program.pdf
    • http://mijitililifi.epizy.com/barashada_naxwaha_af_soomaaliga.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_off0000ee85.bin
7aed4ccdf944644327f0cf143a8ea65e6d708b0ffd4316415ee81e67b7510459
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 5204 bytes
font_01_sfnt_off0001003c.bin
4685c25296fdbf2cadcce64eca489d4c89d559a5897d6cd18426389aba937dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 11140 bytes
font_02_sfnt_off00012591.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12591 4324 bytes