Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac790daeb0a289b…

MALICIOUS

PDF

80.6 KB Created: 2021-04-20 08:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9afff2ba290c58de0737ee4a54ce7ce SHA-1: dce98893a73f87cc1d7bcdbcfd21a01facf301d0 SHA-256: 1ac790daeb0a289b72e0c730098bee9f6b3cfef72c74adabdce63222d2aa76ef
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM' containing 30 external links. One of the primary URLs, 'https://ponafet.ru/strik?utm_term=what+is+the+scientific+word+for+exaggeration', is directly referenced in the document's metadata and heuristics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=what+is+the+scientific+word+for+exaggeration
    • https://cdn.sqhk.co/tovozovuzedu/tDig1jj/word_copy_table_cell_colour.pdf
    • https://cdn.sqhk.co/dujagazatad/DRgelgd/master_trigger_locks_keyed_alike.pdf
    • https://cdn.sqhk.co/zikegasenar/8etEheK/82155773432.pdf
    • https://cdn.sqhk.co/zolewiko/g6EhbHb/hockey_tops_uk.pdf
    • https://cdn.sqhk.co/fetumamuv/ihfMXnX/movie_maker_windows_10_64_bit_free_download.pdf
    • http://kagutakonupana.iblogger.org/attaccamento_e_perdita_vol_1.pdf
    • https://cdn.sqhk.co/jiledexuda/rlAhix3/7504725179.pdf
    • https://cdn.sqhk.co/sojowidaz/3LFm8WO/don_t_touch_my_phone_pictures_cute.pdf
    • https://cdn.sqhk.co/puxolika/jalFsFr/rawafomanifam.pdf
    • https://cdn.sqhk.co/mimufedu/yjbMdwv/skyblock_wikipedia_roblox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://disofebuwugojuj.epizy.com/beauty_and_the_beast_1991_songs.pdf
    • https://uploads.strikinglycdn.com/files/3fed2656-fa1e-419a-b00b-3df4e13c58cb/betojejabezudotisu.pdf
    • https://uploads.strikinglycdn.com/files/d211634c-4bb8-4734-8dba-b908063428e8/fearless_music_video_taylor_swift.pdf
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_a01cdca829234efa84ac4ea281008fb4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b2716845-e252-4f00-b1e6-4bc26300bf8e/rain_bird_5000_plus_left_stop_adjustment.pdf
    • https://uploads.strikinglycdn.com/files/b8b175a7-d9ac-4142-ba69-a827c1583514/xodojamovuniwimelutevuful.pdf
    • http://wenavigabex.rf.gd/formato_carta_compromiso_de_adopcion_de_mascotas.pdf
    • https://d934ed86-632c-4751-b35b-4303166f997e.filesusr.com/ugd/be0f55_995220b1b7a049528caaa90b2e78493c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/969fd0b8-6a05-428f-bb70-d8376402c705/conair_clippers_21_piece_haircut_kit.pdf
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_66be43e41bbb4a03aa21f6d30f0febb5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/47f1bd65-10f5-4e8c-86b1-7bc7d17ad219/35450046267.pdf
    • http://gefegeku.epizy.com/ponalebenevop.pdf
    • https://uploads.strikinglycdn.com/files/71e117dd-bd21-49ec-af77-c431a387509c/mukukonep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb47.bin
01e20e54839ae180667526b882343497b5a970e867d1b0874dac433e54ca3f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 5424 bytes
font_01_sfnt_off00010dd5.bin
6b12f3709a98991a87d9a74d524beedea3dd5a40178bc0dfc31aa146238a080c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 11376 bytes

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