Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71a0fa6db082ddb…

MALICIOUS

PDF

68.1 KB Created: 2020-12-11 03:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1593f54b34dd702264cacb8a2b33ab96 SHA-1: 9106f6106a93de60ed41e14e0bfbb2800c891436 SHA-256: c71a0fa6db082ddb7213344258205e134c7f5597c009935c3582ed4e4a77c0de
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of a link farm designed to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of outbound links, with one pointing to 'trafftec.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

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://trafftec.ru/aws?utm_term=picture+collage+maker+free++with+crack PDF link annotation
    • https://jopovasido.weebly.com/uploads/1/3/4/6/134619877/kugasevipejaful-lamularavupo-lenumizijajimoz-juzomawipixemox.pdfIn PDF document text
    • https://mogugadikawes.weebly.com/uploads/1/3/4/0/134096191/a0d12e8139.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/sezoxel.pdfIn PDF document text
    • https://bajekilirevi.weebly.com/uploads/1/3/4/8/134868337/4b3cdeca99.pdfIn PDF document text
    • https://lizuvozirowamu.weebly.com/uploads/1/3/4/7/134719338/ccdc90.pdfIn PDF document text
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/wikedubupifu.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/litesusujolap.pdfIn PDF document text
    • https://lugoponogib.weebly.com/uploads/1/3/4/4/134404253/dizeritalegigaku.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/55afca51-b416-4777-877f-135abc347359/37192701151.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e9661e25426e12f0c3d/1606373014999/4793934927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f593377-ca2e-4f46-ac67-eda98e0bbe3d/parallels_mac_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc911af-9b01-4c47-b726-fff171bc556d/10820389021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f552eda6-81b3-464c-92a5-af3691646139/23924832241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24f0808-39c9-4777-8e35-e20c2add58db/63060452185.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fc2705c1972c46e3cecfd41/1606578268808/82167684826.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_off0000cd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1B 5276 bytes
SHA-256: dbb5dad9e9a3d177d94642933bf1dabe9c2ef12437ddd771f5f0a1ccd8db3e5c
font_01_sfnt_off0000defe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFE 10752 bytes
SHA-256: 96eac29b88679f5e04880a00732eb49a5ef79eb7bf8c9418b9f722d8d2f873ee

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