Malicious PDF — malware analysis report

Static analysis result for SHA-256 67075300e9c0b0a8…

MALICIOUS

PDF

67.0 KB Created: 2021-03-16 21:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 84912ba1ab90861b777c5abe490ca59d SHA-1: c77f7d09c83c40b15e725e9d8b4abef71d170a32 SHA-256: 67075300e9c0b0a81df02a0a92e1ba83c59879e00bc65c53105ceccfc900ce89
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'druttle.ru' and mentioning 'synaptics pointing device driver windows 8', suggesting a lure for users seeking driver downloads. The PDF's structure and the presence of many external links on disposable hosting further support its role as a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=synaptics+pointing+device+driver+windows+8 PDF link annotation
    • https://cdn.sqhk.co/fejisedetu/hgTdhiA/wuwumukodibazalanawoxuf.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/Phc4Fgd/33189969415.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/ygh9nhi/29173200769.pdfIn PDF document text
    • http://chempion.coffee/size_of_cherokee_nationylr61.pdfIn PDF document text
    • http://remontlegko.info/takagapodowesukowikewumepv2kod.pdfIn PDF document text
    • http://umdtheatre.ru/4180289531udwgq.pdfIn PDF document text
    • http://creamwalls.online/the_beautiful_and_damned_quotes_g_eazykf5iv.pdfIn PDF document text
    • http://normal-id.com/crazy_for_speed_2_game_mod_apkxnf48.pdfIn PDF document text
    • http://fullstacket.online/tibazuzc6dg2.pdfIn PDF document text
    • http://1eyvgo.xyz/makebesofebizitixatukomjn2s2.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/1556849c-2d12-4b92-811e-694820986efb/kitchenaid_stand_mixer_sale_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da589346-863f-4d25-b2e8-d3770ec9eb4c/authors_purpose_activity_worksheet.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_42311151c1c34a1e995984b5ee61bc39.pdf?index=trueIn PDF document text
    • http://dizakopalelur.epizy.com/nusufunirabizawi.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_795ecc13a3694701833c72eb5776d9d9.pdf?index=trueIn PDF document text
    • http://wakagita.rf.gd/muscle_skeleton_3d_anatomy_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3335051-102c-4615-b98d-c30c718cb23c/4275357099.pdfIn PDF document text
    • https://16fd32d6-95e0-4b29-89ad-7162b4f2ffbe.filesusr.com/ugd/9f4b57_be4607479be94cffb9d52c50ecb604bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/395b5c5e-7d9b-4e58-90d5-694688eedbe1/xideruzasisetezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe01673-f90e-4fd5-b1be-4f77a10c995d/41373731012.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_4c389a2f15e54b4799a1de0a07be8bf9.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65C 5760 bytes
SHA-256: 62171953133bba5e83a85c6b544d2f8cc56e8b4f0275bc51817fa0942c2ccda2
font_01_sfnt_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 10844 bytes
SHA-256: 812070a7ee1d0a95776d1efeda0cbf7556e4213bb57750acf3faefb3d4fa1f24

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