Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e48fe187821a150…

MALICIOUS

PDF

86.1 KB Created: 2021-03-12 14:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30bbb1df694e961d8fde0085e41d7771 SHA-1: 7655ba03cd4a8312b5b9953b7b6f6b573031cfa4 SHA-256: 9e48fe187821a15045ea5c947bbbcece8b37309b4967244f01cd0a35bdb9c506
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm designed to distribute malicious content. The primary malicious URL identified is resalured.ru, which is likely used to host or redirect to further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=mountain+athlete+nutrition
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/lipofe_radaledoto_vofesijaziluz_kokamemob.pdf
    • https://cdn.sqhk.co/kubabulukod/DgjfbJn/miromarizigidukeb.pdf
    • https://gagavupotiwek.weebly.com/uploads/1/3/0/8/130813998/vabuda_nuladu_woxabiri.pdf
    • https://fogisitulen.weebly.com/uploads/1/3/0/7/130775537/1235912.pdf
    • http://finipupote.mywebcommunity.org/1972_aristocrat_lo_liner_for_sale.pdf
    • https://cdn.sqhk.co/vifejoneses/ieTlgi3/28785126263.pdf
    • https://cdn.sqhk.co/joremeve/geOljij/microsoft_azure_training_day_fundamentals_london.pdf
    • https://cdn.sqhk.co/xudevekelefe/GheqXhj/epic_race_3d_unblocked.pdf
    • https://cdn.sqhk.co/kalusoxat/KE8cib3/highway_to_hell_tab.pdf
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/cec3b384ebb9a.pdf
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/4934581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1178276c-4e33-4b50-baea-e5f4ff6b0c0d/shadowhunters_the_mortal_instruments_cast_movie.pdf
    • https://uploads.strikinglycdn.com/files/b935c7ba-ee69-46e8-89a6-11899fc04b36/69809391617.pdf
    • https://uploads.strikinglycdn.com/files/faa35dcb-04ac-43d2-9eb6-8db074b07bde/what_feeding_niche_is_a_equus_grevyi.pdf
    • https://uploads.strikinglycdn.com/files/13909a0f-35c1-403a-a85f-7f74c9e46a50/11859763662.pdf
    • https://uploads.strikinglycdn.com/files/1998ecd1-e89d-4174-874d-ff9ded0889fd/vector_calculus_5th_edition_solutions.pdf
    • https://uploads.strikinglycdn.com/files/45f47854-343a-460a-95cf-9556e2915b7e/maze_runner_the_scorch_trials_full_movie_download_in_hindi_480p_filmyzilla.pdf
    • http://kepagewav.atwebpages.com/how_to_check_bp_with_wrist_monitor.pdf
    • https://uploads.strikinglycdn.com/files/2018ab66-f03e-4d52-bfe8-2cf10d0dfd55/how_often_to_replace_vitamix_blade.pdf
    • https://uploads.strikinglycdn.com/files/f56f6195-bb46-4bd3-95e1-d50f65b20492/how_to_record_on_dish_hopper_duo.pdf
    • https://uploads.strikinglycdn.com/files/be8fdd46-1492-43e3-8026-8d0aa6e6a1f2/the_busy_tree_book_activities.pdf
    • https://uploads.strikinglycdn.com/files/5e059c5b-12e0-41ae-a56c-8ac1f6153ff9/46468856632.pdf
    • https://uploads.strikinglycdn.com/files/11c137d4-3b83-43bc-94ea-68510a35d01a/paruvegogax.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010228.bin
a8b7a606dab25cebba078a560c177e638b7432b1a616564b1d283f4b9756e632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10228 4600 bytes
font_01_sfnt_off000111ca.bin
3964a68b8276376e2ce489aac070296d92507f19d789942b555451d54c038c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111CA 10380 bytes
font_02_sfnt_off00013563.bin
5561c4d82fbfca81a66c04c36e059cfbf7b6188384656767d3368d526b1af784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13563 16296 bytes

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