Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cc0e0089fe0999…

MALICIOUS

PDF

62.8 KB Created: 2020-11-16 21:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2ec7a6cfdd1ec800a5f377753080a0d5 SHA-1: 00d93d4dbfb84d9fe2d66fd3e89e5c1e28f920d7 SHA-256: 26cc0e0089fe099926dfae582ad8ff75cc1b344892e25eb4e26f8aacb6d833d1
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to potentially harmful external sites, likely for 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=cute+cookie+coloring+pages In PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/gajufogo.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/738763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_5fa57c97a6395.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/1894925.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/278307.pdfIn PDF document text
    • https://logozirajukafod.weebly.com/uploads/1/3/4/8/134848231/3438264.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/62d1a0b9-c8bf-47f8-83bf-f84f3120e87f/37226917420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816d0f34-81ad-4d30-9394-38aa1fd4e9a6/del_valle_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58beaca7-7dcf-4e18-b88a-f84a2cbb7b2d/91058761209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2243f24c-0af9-4a4d-bb51-1f0862abe600/destiny_armor_set_bonus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8889d45-c6a6-4468-b737-4c107183e32d/moodle_nbu_bg.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/paypal_hack_apk_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/inclined_plane_physics_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/fivujebugu.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_off0000bae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 5068 bytes
SHA-256: 64fca4b61d6ec6ccb333180388b88aa22761516dd143c62e1db1f6de0d19988f
font_01_sfnt_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 10048 bytes
SHA-256: 103ca5d0dd1d129e95fac419d1cdd7856174681a2c5001bbc4e4815141d104cd

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