Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b698777301132b1…

MALICIOUS

PDF

82.3 KB Created: 2021-03-30 02:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910d62201e87c3eb3ac74e06c20ff7b9 SHA-1: 5d10cc1b83ff8195ba943b200f46ae4ba5545dcb SHA-256: 6b698777301132b1d3c55d77db4fb5b22c6e1ff78cae86c836725c6640a0b1d9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URL pointing to 'zajinet.ru' suggests a phishing or credential harvesting attempt, disguised as a 'Bitlife guide jobs' document. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate it's designed to redirect users to a malicious site.

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://zajinet.ru/wix?keyword=bitlife+guide+jobs
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5fdd9d68549b9.pdf
    • https://cdn-cms.f-static.net/uploads/4370767/normal_602331fe49349.pdf
    • http://limezage.scienceontheweb.net/michael_jackson_moonwalk_book.pdf
    • http://vowewudimo.mypressonline.com/94116365915.pdf
    • https://cdn-cms.f-static.net/uploads/4467589/normal_605efbb974676.pdf
    • https://cdn-cms.f-static.net/uploads/4476301/normal_60217df443a9e.pdf
    • http://togaxifobuf.mypressonline.com/39751397980.pdf
    • https://cdn-cms.f-static.net/uploads/4401973/normal_60585f18cb8f2.pdf
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fe5d77eca438.pdf
    • https://cdn-cms.f-static.net/uploads/4443594/normal_60566313d91ff.pdf
    • https://cdn-cms.f-static.net/uploads/4378855/normal_602d947cc97dc.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_603021eb93417.pdf
    • https://cdn-cms.f-static.net/uploads/4374178/normal_601884d988f61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/piradi/sowipadenugisirarimiku.pdf
    • https://s3.amazonaws.com/lebejos/abdominal_and_pelvic_ultrasound_report.pdf
    • http://sovogezo.atwebpages.com/acme_thread_specifications.pdf
    • https://s3.amazonaws.com/minaxigevani/60372994922.pdf
    • https://s3.amazonaws.com/woxorojero/13998040746.pdf
    • http://bibezakomi.myartsonline.com/anime_characters_stronger_than_one_punch_man.pdf
    • https://s3.amazonaws.com/verirejon/pelilewaziberusuwiliwalix.pdf
    • https://s3.amazonaws.com/zuxime/nezuwupovuzota.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_off0000f8a1.bin
7ffb2313d1a20197765a148407330e618e99a7c17b5385f327c350cde57973de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 4808 bytes
font_01_sfnt_off00010916.bin
34f4b6f63b5ec53035817827a20631ce7abfe4622ca6224c97d06412574bb574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 10688 bytes
font_02_sfnt_off00012d92.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D92 4324 bytes

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