Malicious PDF — malware analysis report

Static analysis result for SHA-256 19175403dfd3d1af…

MALICIOUS

PDF

62.3 KB Created: 2020-11-21 19:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21e0e213d10571c989f4e0153f3efa7c SHA-1: 9102d67de0ed9a47e76ad357ac3a06bdebf185a4 SHA-256: 19175403dfd3d1af8e2cb3dadda320d65ec6dbb1f43c5b09d4a1d4207adce3c8
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 0.9994

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://traffnew.ru/123?utm_term=ryobi+31cc+trimmer+plus+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fa57e6ecab55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5f935cb2e2104.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/bufobusenaw_novusasewajo_dawaturu_pabevidoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5fb5937d0056b.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/mijesejuwa-zoxabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4e082ded-ba70-45a1-b4c7-d6d47408fda2/59451921898.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/3599294104.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/roxexit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c542b13-71e1-406c-b0f5-76344042d6b9/zixuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/feretibuvemijosafanakagor.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/valorizacion_de_residuos_organicos.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_off0000ac10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC10 5320 bytes
SHA-256: e33486981714ce9113e9e4bd9da31eb64df89f953eac174ec04d0cf553051da1
font_01_sfnt_off0000be27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE27 9568 bytes
SHA-256: 7c8559900e128a9919595f37d259872a9c9793e2e7fc26c548ddc2ea8ca6576d
font_02_sfnt_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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