Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c698bcb37daa78…

MALICIOUS

PDF

75.5 KB Created: 2021-03-25 02:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a8bc221dfd760392e94ac111dbd410b SHA-1: d6f31061af794d69f83f2e55d6255760a97f8614 SHA-256: f0c698bcb37daa7851266213ecf84f556c8fb5be5ccb5caf65cbc20c216da2f1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=ionic+nomenclature+practice+worksheet+answers PDF link annotation
    • http://jobediniberine.scienceontheweb.net/39752446733.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378378/normal_6005fa4b0e11b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5fdff3d34db40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_812bd13bf80d47d097734137ab0db9c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufupu/togixemamulixivani.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/kogobi.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/72204616537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c33a57f-6993-4d0d-a04f-a964180e9b9b/71512446138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78665b2e-aeea-4d4b-943d-85545443d565/list_of_greek_gods_and_goddesses_and_their_powers.pdfIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_28e0fb1bc23548f0b62c98ab1e89d1a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/bode_thomas_by_mohbad.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/liraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1e3bfb-07c5-4999-84fe-d5ea74e1a527/possessive_adjectives_english_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/gebigedusojaniziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82b86a7-40fa-48e5-a1e5-949c4a5e816a/3302469306.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/nowirovazebir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8157552b-d160-41e0-8b00-babab9a4852f/ruzebugadimam.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_95be91be7f77458385c500527a32ecc4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeef8cfd-4dda-4089-af27-2052e8ff30fc/kegimen.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_ad0570f05bb44b2faa096ac582e08e44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timituvupame/sinokejijufaxomorov.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_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5268 bytes
SHA-256: 1c9a5c3cb649b47ffcdcde0a98da3718dd695fce3367a70e5d8b517666b5a729
font_01_sfnt_off0000fb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB76 10316 bytes
SHA-256: e58ecab0c60d908bc15ac86e3e4a070b875f74e5f03808ac83011bd7f59c460d

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