Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b38acafc5ce50f…

MALICIOUS

PDF

120.0 KB Created: 2021-03-20 06:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5193819fa8949ab8f92a9017fb86d92 SHA-1: 170131fb7ef52ec8bf00d7986e2aace1eaabeae3 SHA-256: c6b38acafc5ce50f5b451b654515411c5e74c8ba7b5995ee30cfbb2b79247f74
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=alchemy+apk+premium PDF link annotation
    • http://febisulel.22web.org/rafenuvu.pdfIn PDF document text
    • http://electorat.org/visual_c_2010_express_vcexuflp.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/hehchdl/making_cake_icing_thicker.pdfIn PDF document text
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/musalesobuf-ruwuwukoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/BhfvsGq/razisorogitozozep.pdfIn PDF document text
    • http://ayazshabutdinov.club/the_imitation_game_movie_review_in_tamildk5aw.pdfIn PDF document text
    • https://rukupapafi.weebly.com/uploads/1/3/0/7/130739745/renaxu-pikife-sojosojikafuw.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/gzbThhc/doximonos.pdfIn PDF document text
    • http://evakuator-uga.ru/40832071262534p8.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/kajibobe-zajagorixu.pdfIn PDF document text
    • http://mezapadanufelon.iblogger.org/garmin_gpsmap_76csx_repair.pdfIn PDF document text
    • http://localdesign.me/how_to_turn_on_voltas_ac_without_remotepoiir.pdfIn PDF document text
    • http://taxiditugivubed.iblogger.org/lopemobumifaxe.pdfIn PDF document text
    • https://kunasituper.weebly.com/uploads/1/3/4/7/134765547/fasuja.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/f8452667-a464-4e36-9d00-7dc866fb343e/57390849563.pdfIn PDF document text
    • http://torusopaxoneku.rf.gd/2682154343.pdfIn PDF document text
    • http://karadefega.epizy.com/mosavagopakimaw.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/79836424095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ceb27be-1676-4106-ae82-e67f42769ca2/complete_divine_mercy_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c7f19f-4295-49d0-8f7c-c5eebda5094c/77422355282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfea3ec-37a7-4bb3-b22d-471d44ca1420/51249639732.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/86852861251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827c82a2-148f-4d62-b7fb-a30d4bb05d6a/baxeditu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 58064 bytes
SHA-256: d5afb9859eb9e4636938f2509244c7f796dcd9d62ebcad926191c3646d3b29a5
font_01_sfnt_off0001979a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1979A 5148 bytes
SHA-256: b85f213e3c46bba9c303bfef641feb6097f24daaf49fb5182591c9b29d98b039
font_02_sfnt_off0001a8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8FA 11572 bytes
SHA-256: 9737764ec43646ff31a0e8c8b2b6a9f7ead7bc540c1214dcaed5e5b8b4e97b9e

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