Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf790089fdc071de…

MALICIOUS

PDF

75.8 KB Created: 2021-04-04 19:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 106e4abfae74e4b1f75729c55f3fd3f2 SHA-1: 1fa2921d575d805572f90f98ec0665947f616079 SHA-256: bf790089fdc071de2ab5bea8d3d0500a4abdee00ac9aa224ec51a480c1a2baf4
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to creating a CV in PDF format, likely to entice users to click the embedded malicious URL. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing 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://jumiwimov.ru/award?keyword=cara+buat+cv+ke+pdf PDF link annotation
    • https://cdn.sqhk.co/bepotedaxus/ietp7Xb/l298_motor_datasheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_602027d7b2b12.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/iggjRid/bc_hockey_roster_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_6041af73650a3.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/kagan_mats.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/yGIy0if/music_maker_2020_hip_hop_beat_producer_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_6058ae88d6aa5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/88636231093.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/26019756452.pdfIn PDF document text
    • https://f9cb7010-568c-45d0-b0a5-7bd630b60272.filesusr.com/ugd/b10ea2_016c873ee60b4d008d5620c7a75ec3d6.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_5b83db3d98ea49b5adbc2f424917bdfe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a543f83-47e8-4bf6-9228-d5c894d17455/nugezuri.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/4868138795.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/ethiopian_bible_online.pdfIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_a59d6a1f19a94e8ca103cb2072d83f4c.pdf?index=trueIn PDF document text
    • http://seroritubofa.atwebpages.com/siguganolazejis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b299f5e-ff7c-405e-aa23-66570a594600/87972491618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07bffd6-f829-433b-8ad1-fe3bd00d95f4/singer_prelude_manual_espaol.pdfIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_66f77c761fe54c359e27d393c6c8966b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/arya_telugu_songs_320kbps.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_a109e970b0e64c60932955ed3bb0ddf9.pdf?index=trueIn 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_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 5108 bytes
SHA-256: 6051a1eb5360b2e052e083d4df81b027f990d13c4cabb882ef8af1928c75787a
font_01_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 10888 bytes
SHA-256: 0e2c8f80410a4773aa6d3ead5683367abf98451495553a0384d6c62fd88e35d1

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