Malicious PDF — malware analysis report

Static analysis result for SHA-256 64abdd2ed0377d8f…

MALICIOUS

PDF

68.5 KB Created: 2020-11-13 16:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 75cc49ccb5722a1dc2b2139e8ed1bc33 SHA-1: e4f7b70f55d3e706c0c13dd7fa4cf81958ce8ebb SHA-256: 64abdd2ed0377d8f1c9c45e921e79eea2c08d6ed813148ddc25eaa3ed709c4aa
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a link farm designed to redirect users to potentially malicious websites. The presence of numerous external links, including one pointing to 'traffset.ru', and the ML classifier flagging it as malicious strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate it's designed to exploit user interaction with embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?utm_term=tiny+house+kits+lowes PDF link annotation
    • https://lejomibis.weebly.com/uploads/1/3/4/6/134657815/f2264b.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/8a06e49abdf1c1.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/bidakubar.pdfIn PDF document text
    • https://norajaxufok.weebly.com/uploads/1/3/4/6/134611117/7289932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fadc4a6bc564.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/xozowupawerowi.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/wuxozavawuzefewesoz.pdfIn PDF document text
    • https://zazejisodixad.weebly.com/uploads/1/3/4/3/134359446/c1e204ef4131.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/df40a1e6-7824-469d-b4f5-91b6ecd76509/maguvixugatapizapebim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18eceb01-7e5b-42f7-b498-ef385b5a04db/91324901496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd19429-1b83-4894-8f3c-288bc0b5533a/amazing_grace_my_chains_are_gone_sheet_music_easy_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/rijemiluzimalakoketa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e260b7f-427b-4096-ae30-2dc796d7511c/vofore.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_off0000ce7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7B 4676 bytes
SHA-256: dce7e703e973d1a0004c89693749be826ae077f4c9be765ce516966ee90e9db9
font_01_sfnt_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 11780 bytes
SHA-256: d7998dd5e2cd39f16eb5cb5b1ee5db0df2e535cb675a9c8816fc634aa08dca42

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