Malicious PDF — malware analysis report

Static analysis result for SHA-256 577e8829e63dafda…

MALICIOUS

PDF

81.4 KB Created: 2020-12-17 18:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4661144e371b5701c09ba3330e7ad714 SHA-1: ddb9782936bf67981d0a4bcf9eecf87302efd09e SHA-256: 577e8829e63dafdaf6a217cc66911f0fd1df9ec86ceb0b9349fa0be587231f33
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 0.9997

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://traffnew.ru/strik?utm_term=yottabyte+hard+disk PDF link annotation
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/volikefodi-xojegusumas-nokebafosurixar.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/sojaxowixajo.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/fd1b3209b9d.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/c3b9d17.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/8b1c3c.pdfIn PDF document text
    • https://fewarixavaj.weebly.com/uploads/1/3/4/8/134847043/widojazavob-xefenobunulaber-titozegimemono.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/pazifetanegapu/punabuwizutivijiregevigov.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/48609920787.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/musijomasibukotedefelo.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/gedanawuxojow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e4b9fd-387a-4ad0-b68a-8ee18b4ae8ec/amparito_roca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b5b776-b08f-47c0-a262-f690d2668a99/jafowujaxufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a04350-c7a2-4660-8332-4a00a9a18668/fakedazelisez.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_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 5148 bytes
SHA-256: 89a1ed2505c40cc267d1208c665b072f203e6e5f2cc13e60c656ac164b4235bb
font_01_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 11056 bytes
SHA-256: 63e6bc32996364d232134b652836bfd53d36a605385b53b65904ebb4c352665a
font_02_sfnt_off000123f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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