Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2f7b1f9710b9e8…

MALICIOUS

PDF

90.3 KB Created: 2021-04-08 07:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d006743bc04f3fd567f8bff318f33421 SHA-1: 59b82c9e7ad704589a16a789c4f78fd257171c25 SHA-256: 0a2f7b1f9710b9e81f0b4d9b240d6478acf1bb5e902e2efa9d0aa7612c8774a0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which point to disposable domains or link farms, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the overall structure indicate a likely attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/strik?utm_term=henry+v+speech+shakespeare+once+more+unto+the+breach PDF link annotation
    • http://kulinar2020.site/delicious_world_cooking_restaurant_gamep0p9a.pdfIn PDF document text
    • http://marketes.pro/gafulupakupmlft.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/wamuluzogabaji.pdfIn PDF document text
    • http://losinglotterynumbers.com/cyberpunk_2077_console_nexus_modsysuso.pdfIn PDF document text
    • https://najibiwamedixi.weebly.com/uploads/1/3/4/9/134901652/gunixubim.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/082e286ed.pdfIn PDF document text
    • http://ru-1.casa/gonokulevelubawibunidila81mhn.pdfIn PDF document text
    • http://bitsracing.net/jiludizowamiwusuxoxonp8dpq.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://greatholl.com/ophelia_piano_sheet_music_freeray82.pdfIn PDF document text
    • http://crawlmqyu.space/992369612690cd7y.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/8796134.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/6196670.pdfIn PDF document text
    • http://ilkertr.shop/48899172648sn4ae.pdfIn PDF document text
    • https://riwivado.weebly.com/uploads/1/3/0/7/130739124/tesetowave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_a85d9c727b594c4e810303aa0ead58e2.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_38f9b056fa094b37a554a3e496418dd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f38f3c1-6cd6-4bfe-b0ff-ecb4edf6ccd6/coso_framework_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e276d17d-6400-47c3-8af7-cf5248afc769/xunijemapelivufutitena.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_380b66d03b1d4632a9d44150c06580e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4887a7a2-3333-4833-94d4-2e8a5dd75b93/how_long_is_a_3_000_word_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64aa98ec-01f7-4888-b8c2-7ee7e0fc2fde/que_son_calorias_en_quimica.pdfIn PDF document text
    • https://ecad98c5-3f79-4b5a-9309-7060426a101e.filesusr.com/ugd/66ec94_6937cecffa0842c98805b03398733c43.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_03e30ea4211649a489fc0a37d48c71b1.pdf?index=trueIn 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_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 5468 bytes
SHA-256: 16700ea7fb6321a64c6e4d6c3b47ef8c20d3341d725d3988e772621b51ccb906
font_01_sfnt_off00011eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 11824 bytes
SHA-256: 253ce4ed7d54545c6bb759a242296285841644fba61927ab6fbecf93dff8b196
font_02_sfnt_off00014641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14641 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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