Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f0b4b4fc3faad3…

MALICIOUS

PDF

73.9 KB Created: 2021-03-14 13:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99c74ec23253dc0fffed0c9d2e757e92 SHA-1: 2ab31999efb8c696594638ccdb37ab54235b6ebb SHA-256: d0f0b4b4fc3faad38ac546d4f6d6d831fbe80d6b6dc9ea5c53c8eec4d11771f2
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, one of which, 'https://kuzutuzo.ru/wix?keyword=imvu+apk+mod+ios', is directly flagged as an external URI. The presence of these URLs suggests the document is designed to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=imvu+apk+mod+ios
    • http://jepowoxudo.iblogger.org/deridetaxaliwilu.pdf
    • https://cdn.sqhk.co/beledufe/gyhihbm/49398745187.pdf
    • https://cdn.sqhk.co/tasokuxu/YgciaFo/top_10_best_movies_of_the_rock.pdf
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/3083074.pdf
    • http://bawimip.sportsontheweb.net/65067212005.pdf
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/milemavirijafobusobi.pdf
    • http://kadanijojabuf.mywebcommunity.org/78206504264.pdf
    • http://kokolonesafu.getenjoyment.net/6000034915.pdf
    • https://vezidinudavad.weebly.com/uploads/1/3/4/4/134481570/badunutepowigubigiso.pdf
    • http://rijebipimaba.getenjoyment.net/wofozuwipibajifalifepawix.pdf
    • http://mereravewesone.iblogger.org/87749553166.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aeef2768-5613-4233-9101-213482792cc1/16834920035.pdf
    • http://nimobavaze.epizy.com/android_studio_latest_version_list.pdf
    • https://uploads.strikinglycdn.com/files/4a88e726-0d1c-4598-9d8c-9ac070a17f1f/23839928770.pdf
    • http://tediguku.atwebpages.com/kamelubuvudesidazivevekav.pdf
    • http://gefifeji.rf.gd/basic_concepts_of_differential_and_integral_calculus.pdf
    • https://uploads.strikinglycdn.com/files/bb9f6716-ad66-439a-bf4d-63f006d8bf09/2000_jeep_grand_cherokee_sport_fuse_box_diagram.pdf
    • https://uploads.strikinglycdn.com/files/df83953e-cf48-4bc6-9b72-492e0c2c018b/shatter_me_chapter_1_summary.pdf
    • https://uploads.strikinglycdn.com/files/fcf5094c-cf95-42bc-89e3-99171915316c/python_two_for_loops_list_comprehension.pdf
    • http://lowadof.epizy.com/zeleniluwaziporo.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_off0000e3be.bin
0b8edca7335880a7fc1523798d7f944ea7551ed04d9375546a8c1eefbdcbad80
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 5036 bytes
font_01_sfnt_off0000f4d6.bin
2064851c4ff4e97d847f90e951ea572fd9ede36168b71de75789aef03b17e06f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 10588 bytes