Malicious PDF — malware analysis report

Static analysis result for SHA-256 e217641ec5ce6991…

MALICIOUS

PDF

81.4 KB Created: 2021-06-13 14:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4adb1e9182fa14563808dccddb861911 SHA-1: 6cacfb776593fe58072dcdc3796665327e85a9b4 SHA-256: e217641ec5ce6991339b6b127de0199e274e7d572da16ff3bdf14d418af77ce7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to downloading mp3s and mentions 'wkhtmltopdf', indicating it's likely a lure to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://medvor.ru/pbw?utm_term=download+mp3+shawn+mendes PDF link annotation
    • https://ligizedafovawu.weebly.com/uploads/1/3/2/6/132680967/d197b518379e7e.pdfIn PDF document text
    • https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/xamikuvazapimisopuri.pdfIn PDF document text
    • https://dupukaradox.weebly.com/uploads/1/3/6/0/136015529/darememilirijexawuk.pdfIn PDF document text
    • https://xajavixakopus.weebly.com/uploads/1/3/4/8/134898113/4450923.pdfIn PDF document text
    • https://dozajumeguru.weebly.com/uploads/1/3/1/3/131379069/7544165.pdfIn PDF document text
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/68cb74b2.pdfIn PDF document text
    • https://dusimajigedavim.weebly.com/uploads/1/3/1/4/131453199/wunowegosavat.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/datubagopefek.pdfIn PDF document text
    • https://jijutuvexezepor.weebly.com/uploads/1/3/4/4/134444828/josixepuzisox.pdfIn PDF document text
    • https://vubufuzavedorav.weebly.com/uploads/1/3/4/7/134766784/f38160.pdfIn PDF document text
    • https://tenasubilojeviw.weebly.com/uploads/1/3/5/9/135993528/kupesokusudu.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8921993.pdfIn PDF document text
    • https://lujalidulosegex.weebly.com/uploads/1/3/4/3/134369289/kevagazen.pdfIn PDF document text
    • https://kotidureguk.weebly.com/uploads/1/3/0/7/130776457/0ddc663be.pdfIn PDF document text
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/worajumefipu-lapam-lugimobu.pdfIn PDF document text
    • https://gikigafe.weebly.com/uploads/1/3/4/4/134440869/20aa361e.pdfIn PDF document text
    • https://zefowuji.weebly.com/uploads/1/3/4/0/134096403/xuwopo.pdfIn PDF document text
    • https://jabipiduluw.weebly.com/uploads/1/3/4/6/134662585/4220679.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/5a6bd254-dfeb-4673-9ede-ebef420b3e87/the_mountain_road_movie_cast.pdfIn PDF document text
    • http://sirazumebow.pbworks.com/f/74337237397.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144874545/50397451909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a014d7d-ac55-4c62-96c9-3b0613bde84c/73959419283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96730bf-96a9-4f97-86ff-40f43ef52186/liponomirid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26c3a58-e73f-4ae4-9e51-ef3cf4ef7d0b/how_do_i_reset_my_maytag_maxima_front_load_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7162cea3-4e68-448f-a55f-9c95a93d51e3/nogopijokesokime.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144458376/45265947518.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 5356 bytes
SHA-256: c05c8bc70e2d944a28246c242b7a06a3b9ffd7118419fe88e7df5196ebf63184
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 11528 bytes
SHA-256: 813f4c77a0326e25dd0f135e0b58ee34b9174ada8517b5d8a2647023a45db7de
font_02_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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