Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eda2f48d90d361f…

MALICIOUS

PDF

80.6 KB Created: 2021-05-25 13:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e420512eb422d94cb98599e55dcc2cea SHA-1: 2df6bc21816c656aa3bdfd3a986b38d5232cd2ba SHA-256: 8eda2f48d90d361f429e49ea29dc9240313a7575d62ba7cf2514b66b692132f4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing or scam site. The document body, though partially obfuscated, suggests a lure related to 'proteins factors of initiation', aiming to trick users into visiting the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=que+son+las+proteinas+factores+de+iniciacion
    • https://cdn-cms.f-static.net/uploads/4424953/normal_6067322d382ef.pdf
    • https://static.s123-cdn-static.com/uploads/4421464/normal_600528c42caee.pdf
    • https://cdn-cms.f-static.net/uploads/4389568/normal_60624054251e4.pdf
    • https://static.s123-cdn-static.com/uploads/4369333/normal_5fcc8e8d1d217.pdf
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fed58fee3bc4.pdf
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5ff29f42aa980.pdf
    • https://static.s123-cdn-static.com/uploads/4417815/normal_5fef43fd8e735.pdf
    • https://cdn-cms.f-static.net/uploads/4481825/normal_6062781ab016d.pdf
    • https://cdn-cms.f-static.net/uploads/4448750/normal_606871be1df7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/deb9833d-5af1-42f8-8fcc-13805e392e82/tolimixawowarobogedewoluf.pdf
    • https://s3.amazonaws.com/xunilukegez/jitujodudapugisolofewetef.pdf
    • https://uploads.strikinglycdn.com/files/43b5492d-9f58-477b-bd4e-58f1f308e512/noxevejumifoxutenejojife.pdf
    • https://uploads.strikinglycdn.com/files/333949b1-e410-4492-8405-b3f255c9bb3d/star_trek_enterprise_tpol_baby.pdf
    • https://uploads.strikinglycdn.com/files/454cdc07-2ffc-49ea-b663-f0445fe3525e/fanamuvexubugogubavog.pdf
    • https://s3.amazonaws.com/rowubunak/wanted_bhojpuri_movie_link.pdf
    • https://uploads.strikinglycdn.com/files/ed1220fd-f39f-4170-a3f5-4a78cb9d5085/wowekavugam.pdf
    • https://uploads.strikinglycdn.com/files/5566ae0d-95b6-41ca-b936-cc3c300f56a5/98469417996.pdf
    • https://s3.amazonaws.com/mipizaju/adaptive_functioning_psychology_definition.pdf
    • https://s3.amazonaws.com/sefabe/18529039886.pdf
    • https://s3.amazonaws.com/debiwelof/vicks_vul520e1_mini_cool_mist_ultrasonic_humidifier_instructions.pdf
    • https://s3.amazonaws.com/savifin/tixajeputeloragizugi.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_off0000ed25.bin
88241197115148268c91cf30acbe928269a39e404003f49946e6613436a7d9f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED25 5092 bytes
font_01_sfnt_off0000fe7d.bin
60494a6f2d831f5498f282346100c7c6d48e96c68c34431f6da4055f16cd48c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 12420 bytes
font_02_sfnt_off000126e9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126E9 4324 bytes

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