Malicious PDF — malware analysis report

Static analysis result for SHA-256 db80bc7641217f07…

MALICIOUS

PDF

78.7 KB Created: 2021-02-25 08:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ca6bd7faf5424acbc3e0a64b9a40d092 SHA-1: d199b0f6781b8fd0fc60ce3dd3701ae18f16a82c SHA-256: db80bc7641217f0773687975f46b63a4b1bad9d5c07a3de95db0d89c74d6739c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to other PDF documents hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=the+snows+of+kilimanjaro+flashbacks+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382771/normal_6036d9e9e34cb.pdfIn PDF document text
    • http://wosatonosefenaw.iblogger.org/18464867068.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/94f9d1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_601cd2fb6d2f2.pdfIn PDF document text
    • https://rosiruwolokixa.weebly.com/uploads/1/3/4/7/134765588/jizav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_6011defd6f0c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446259/normal_60048aa4a4a35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452374/normal_5ffe549a2dff1.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/totekugovibow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_60358beaaf108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5ff496b3e80a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_6004ead443ea2.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/woforedutivap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_6028f14a9e760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_5fd67926749eb.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
    • http://nosigegu.onlinewebshop.net/how_to_reset_voicemail_on_mitel_5312_ip_phone.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/lord_of_the_flies_important_quotes_chapter_1-3.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_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 5252 bytes
SHA-256: fd637119612b2d064c849837a8eccb189a2b65d109bfa08b6b5c42234856a010
font_01_sfnt_off0000fd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 10124 bytes
SHA-256: 06a8badc3d53a29ee28624bd98f8f6b22186768f285008fe160c273350df76f0
font_02_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.