Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f7967297a3f56a…

MALICIOUS

PDF

78.7 KB Created: 2020-12-26 02:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1d4bc992233de9046ce0ba046a956eaf SHA-1: d33fcdc04f8c27367807f886488335c5b3287b9a SHA-256: f8f7967297a3f56ace8776c5f051679c5ff76daed0308ce5cbb5b7c8ee887d61
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://traffnew.ru/aws?utm_term=product+costing+excel+template+free PDF link annotation
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/xuwaruru.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/KbjfUji/sasefiw.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/1592387.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/jedisaz_jevokuvevomugeb_tudojis_ripogalumegirak.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/bobipigidelavuvenuw.pdfIn PDF document text
    • https://cdn.sqhk.co/dofulokune/CZoiVjh/10699698703.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/2f81546b-9cd9-4a28-bc7f-a57f325399cc/out_of_sync_child_has_fun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b60d9b-f917-4249-949d-92dd438cbb5b/kafojukupipowokew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505be9db-0e00-47e8-9f5e-6800176c740d/woladimanubavulol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f893bb8-d57c-497d-98af-93d22fa2c667/woriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d95cd53-545f-4b17-ad4f-0b6aa97390d0/rumukibalusadatuluxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ea5493-f9be-4c88-bf19-f8d648d6b0c6/28413752407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cf3248-7621-4949-a8c4-4268b5235c1c/ragod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f3d35e-4ba4-4b38-8f15-e149d2b10470/73134080170.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_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 5544 bytes
SHA-256: 5651f615a2be3dffff04c14b196e2bd0190fc827962a201bcf2865b466f0bda4
font_01_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 10264 bytes
SHA-256: dcadcfb7a2e85f55e8ccf312c8e23d09186c2226816e464d397f62ee5f49cbd2

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