Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f2ac45b8845346…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 18:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d8bcc708bdbd22392f7696aa73d6ede1 SHA-1: b2af446751be553775a88900fa2be1c1b0ccf8a3 SHA-256: 70f2ac45b88453462d737dc9a0d8f7a1a89ff1c3ca2f34ed4e4e474c4b6ea25a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on directing users to a suspicious domain, xezojetit.ru. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/award?keyword=cambridge+english+objective+pet+teacher+s+book+pdf PDF link annotation
    • http://brumbum3.xyz/best_interior_design_course_in_new_yorko5enx.pdfIn PDF document text
    • http://zotusomadelisok.22web.org/spotify_premium_hack_ios_11.pdfIn PDF document text
    • http://shothard.site/new_yorker_subscription_prices39448.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/austenitic_stainless_steel.pdfIn PDF document text
    • http://badge-verification-center.com/9841033667638xhv.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/83779192680.pdfIn PDF document text
    • http://activa-fb.com/96461823603q3iuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/free_backend_server_for_android_app.pdfIn PDF document text
    • http://sazitoza.epizy.com/nexudixumemijonuw.pdfIn PDF document text
    • http://tamupevex.rf.gd/58666019491.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/english_literature_novels_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/blomberg_american_fridge_freezer_manual.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_0f58e70e29654815ae89f8de9e75cf4d.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_06e7fd98486c48a5a57b53fea57287cc.pdf?index=trueIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_3717a951091544c183ce8ef8edac60fa.pdf?index=trueIn PDF document text
    • http://pufaxutunipoja.epizy.com/2143409553.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/25270727159.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/vosazuxubuxilapeviwazew.pdfIn PDF document text
    • http://zojasofox.epizy.com/73268741084.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/42664720526.pdfIn PDF document text
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_1d9978b064374e6682946ba77172c94d.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_bb43bbdbe5c54798a1a95f1939cc9b5d.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_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 5816 bytes
SHA-256: f8cfb5fb0d2707b0cf878a7cbd639a371a8a986129119ed7228fb611022eac10
font_01_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 11576 bytes
SHA-256: 0318274e51e1f81773709a03d4cf33bca66279f46410531d9a60cb999bfc63be
font_02_sfnt_off00010cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF5 17152 bytes
SHA-256: 15910dd949c7c72baccc9045142384d839082188cce8ada331907618e91932f3

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