Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d240b6b153867d…

MALICIOUS

PDF

76.8 KB Created: 2020-11-09 18:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 197f4a5bf93b5a919111e10921655710 SHA-1: d8e2dcaa194cc054e82b1419c28b5fff34068b73 SHA-256: 89d240b6b153867df545cde35034c8039c39f3d9764a3465fee464b8b583b690
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 0.9998

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://trafftec.ru/123?keyword=druck+season+1+english+subtitles PDF link annotation
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/782b027.pdfIn PDF document text
    • https://pebujekug.weebly.com/uploads/1/3/4/3/134380671/5bb8ffc546d04.pdfIn PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/liwus_wakumi_boxag_melobizozududed.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/a785a026bb.pdfIn PDF document text
    • https://bezakolat.weebly.com/uploads/1/3/4/3/134321390/8ece2483c50.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/d6eb0f20e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b06c37-8dcc-41f6-ae95-8f856cb86171/2008_subaru_impreza_service_manual_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8666828-a252-4f84-924d-ede5f66a8c2d/what_does_a_hard_flexibility_wand_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7755db-d8db-416f-b464-ad94c5e8fe59/aquaman_cartoon_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c7a453-0cf6-40b6-9930-a1edff35a52e/puwuwakuzobesurizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7feb05-6860-4d45-b3cc-51f8f879761b/bovijogakevolak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510d7b1e-1821-4eed-81c9-eda87704bc45/return_man_4_unblocked_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce611928-23d5-464d-9ac5-97a39143979c/28621518929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6045f354-02c3-4176-981d-22880c078431/xudibuditojurimijaka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 5660 bytes
SHA-256: 1462aca778493ac0bcadf8c7d2e5cdbb340b6a835703966bd6f90326fae691dc
font_01_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5316 bytes
SHA-256: 58eb11dd0a1d94564afd6cc4b8a04f01efca4a0e307b5a5ba3b6446b1ae00abf
font_02_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 12496 bytes
SHA-256: 586366b6ffd174e57455b7244a10d82bce1c09f137b335a48452f8eb337c5d77

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