Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb623006e55d95b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-04 01:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 79fedb56a1df5997b363f5f580278b3d SHA-1: d4776f1308f233da35f1639f2f8eaf20777643d6 SHA-256: cdb623006e55d95b5670a794fc8b2276bcfa8b50fadb4965c9a7fb40cee70a51
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to a suspicious domain that appears to be part of a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL suggests a lure for downloading software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/wix?keyword=camerafi+apk+for+pc PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_02d0e782acac4ad89d57e589665a6288.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_972c4e68975345f1986b167940247e50.pdf?index=trueIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_dad05471f557491eb2d85e1c40a0e72e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/79372808838.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/delhi_belly_full_movie_480p_bluray.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_ae8a0b0d240444c1ba7214a2cf113651.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/memexelu/abacus_5_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/barefoot_investor_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/2174897294.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/57966058522.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_988553c664b64988b1661377956ff0c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2edb12e-b8ee-4619-9904-700d12672128/what_are_the_numbers_on_my_sun_life_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1dedae-363f-446d-93f1-1246155e053a/how_to_submit_a_complaint_to_usps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62649225-b66f-4db4-a0c6-8e3a293c3ab7/28190632876.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/wosuxakojanixube.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_2c4fc6eeeaeb44f9a3f99adafb70e5ef.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_1634d2cd562c4b80a036fde039149af2.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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 4920 bytes
SHA-256: 723c2113dced8c21d49dfe53f113c1622ee714d3e9d2caa7a67d770281046edf
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 16208 bytes
SHA-256: c4b4e8be5382ed508e8bba969912c5c044f8c9649699cbca0c2204ce271f6141

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