Malicious PDF — malware analysis report

Static analysis result for SHA-256 9312d1464aabbc29…

MALICIOUS

PDF

58.5 KB Created: 2020-12-20 19:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ca23dcb8c4647ad02e31b0f1065a87c4 SHA-1: 29ae1a579895829b0f4b773ba1ea3fd111ba8da0 SHA-256: 9312d1464aabbc291b5b75181171f094b722a4ac9d56a605ef81aa6d2ab868f7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan by ClamAV. The embedded URL points to a domain associated with malicious activity, and the document's structure suggests it's part of a link farm designed to redirect users. Although no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions, and the overall context points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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/strik?utm_term=doorking+1601+manual PDF link annotation
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/0ba4f878.pdfIn PDF document text
    • https://guxeximufi.weebly.com/uploads/1/3/4/2/134235584/8676131.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/penotumizapogi.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/3518902.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0ae58e8a4e.pdfIn PDF document text
    • https://lerinajivawexof.weebly.com/uploads/1/3/4/3/134327174/wozozudu.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/e1da278f-e882-4c09-87da-8529449489bc/47088826104.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11d1c2bbd74065807c487/t/5fcf3b4676f3eb1a46df3514/1607416647792/programming_languages_for_2d_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe755414-92af-4610-ae80-eda85690f9e2/78996390523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e4bb8-02a3-4ea9-939a-d2c53a33a430/43617886680.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5216c7d0c8f249d5c593f/t/5fc9c03d41142a3c4b3dd7e3/1607057470520/69371043396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d17a61-82b9-4467-a56b-be59a9314d80/ziwawirele.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB05 5236 bytes
SHA-256: 9801f613cdda10257183404b4ec4a7063a1f5b43be52a0af489ff129d8988f9f
font_01_sfnt_off0000bccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCB 9668 bytes
SHA-256: d4de29b49fe493dcad4cfccb9772af4ab9d3db09d7bb7c5490ce3461d08dc9d1

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