Malicious PDF — malware analysis report

Static analysis result for SHA-256 376b81a2f19db1b1…

MALICIOUS

PDF

75.2 KB Created: 2020-12-27 11:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a22fa288d8c02e94cf25592d9f857f16 SHA-1: 74250fbdf39c7aa535af7415914727a1522bf05d SHA-256: 376b81a2f19db1b164139374410674fdf066464dbf76c2af28ed3c09fb06c22c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to product searches.

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://trafffe.ru/strik?utm_term=buy+sandwich+maker+near+me PDF link annotation
    • https://cdn.sqhk.co/woxipepevati/Tw8yfp5/dungeon_warfare_2_ascension.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fcdacc2b3d9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5fd66373e6cef.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/SN3LOQO/worm_zone_snake_offline_2020_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gggdPjf/sugevukuwezipizogikix.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/fasanag/70322949516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5943c2aa-b64f-4a08-a2a4-40057c6c2ff9/dragon_age_origins_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19730246-c827-48ed-b907-39a3ed655b7f/lepujopexufirikaxivuvaxak.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/seismic_stratigraphy_and_depositional_facies_models.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898de1ff-84d9-4f85-9fb5-ca82dab30884/lasowokigukexivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c73c852-af16-411c-b0cf-462156db6081/kingdom_come_deliverance_game_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36f53d9-feff-4f0f-8f16-326a564cfcf0/68798831963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0c46d2-c883-4118-beeb-4c7f35e78347/porsche_boxster_owners_manual_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 5456 bytes
SHA-256: 26a755b91dd5c7c6c2a91ffeffe12c111406437893fa25d06d94de9cea129369
font_01_sfnt_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 10264 bytes
SHA-256: 5974bc879425971d0544056c13d81de9d3f019dc21c13a10b20dfa55f517b876
font_02_sfnt_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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