Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2124c9c82b0f18…

MALICIOUS

PDF

79.7 KB Created: 2021-02-21 04:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 034ff4e596643e846df0e087ea861120 SHA-1: a1cfefb9c4c58c1daf709d3334197031e4215a46 SHA-256: 7a2124c9c82b0f181a8ebe43a9138b626311a148c8086bcc47815a3cb01db75c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to academic pursuits, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=what%20can%20you%20do%20with%20a%20phd%20in%20molecular%20biology PDF link annotation
    • http://fridgeservice.ru/bowikepegig103bh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5ffc5a3248114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_60070d0805958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_5fe66dc977c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_6023e133a502d.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/bBlhjb4/2672428808.pdfIn PDF document text
    • http://furniture21.online/favirubezetufopzw.pdfIn PDF document text
    • http://rupitori.66ghz.com/82357737441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6012d480378e3.pdfIn PDF document text
    • http://particulieres-societegenerale.best/the_innovators_dilemma_clayton_christensenaeg9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5fef55b316732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd611ede2ade.pdfIn PDF document text
    • http://sofefowu.iblogger.org/88527020880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420476/normal_5ffdfa39a7084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muzafevabuma.rf.gd/guvisabatisexenoj.pdfIn PDF document text
    • http://fujirezidixivu.rf.gd/can_detox_make_you_lose_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/aha_guidelines_2018_acs.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BA 5656 bytes
SHA-256: a41af0942210cdd43ad78165e4d9b60e9143a584d0e48b290206365669b0725a
font_01_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 10708 bytes
SHA-256: b069a5aac084d4e3341bea98577dfe94e7e53f2e95afa85492c5c9206aba02c7

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