Malicious PDF — malware analysis report

Static analysis result for SHA-256 7649f5a0e5e1ff47…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 01:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7cb80eb5febe6f0ff4d111645c10aa6 SHA-1: f4f36bab4e467080c904c34b2664100292d1b12b SHA-256: 7649f5a0e5e1ff47bd03d1b3cf481328531628df08739f48e60badcd319a511c
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to manipulate search engine rankings. The embedded URL 'https://jumiwimov.ru/123?utm_term=wow+classic+rogue+levelling+guide' is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=wow+classic+rogue+levelling+guide
    • https://cdn.sqhk.co/zazavoxujub/hdfGRjc/gudiwusunozewozavijimowum.pdf
    • https://cdn.sqhk.co/taruvufufezu/cQI2icv/gun_range_nyc_prices.pdf
    • https://cdn.sqhk.co/tememukafosu/XRQnudo/pac_man_hero_strikes_back.pdf
    • http://tokexal.medianewsonline.com/kakurebano.pdf
    • https://cdn.sqhk.co/bedazume/FjA2hhi/g_switch_3_unblocked_online.pdf
    • https://static.s123-cdn-static.com/uploads/4450354/normal_5ff57e72069e9.pdf
    • https://cdn.sqhk.co/gunonutib/iage7ij/51062387620.pdf
    • http://dojemop.mywebcommunity.org/visualize_this_the_flowingdata_guide_to_design_visualization_and_statistics.pdf
    • https://cdn.sqhk.co/vimerokil/gfihn6Y/florida_snake_identification_key.pdf
    • http://duwudivusupo.mygamesonline.org/consolidated_balance_sheet.pdf
    • https://cdn.sqhk.co/gogojelawov/jijfThd/escape_plan_movie_trailer.pdf
    • https://cdn.sqhk.co/poxudanefisi/Ymenyif/risk_neutral_probability_option_model.pdf
    • https://cdn.sqhk.co/rarukaboz/hhaTjb9/delimano_frozen_ice_cream_maker_recipes.pdf
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fce585b0dbf6.pdf
    • https://cdn.sqhk.co/lenubire/aGrjigi/auctionzip_fairmont_wv.pdf
    • http://jesawukimefix.mypressonline.com/demand_forecasting_in_supply_chain_management.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_8d83ee49f74a4b6e9b35e75589f63c39.pdf?index=true
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_56da40ae836d47c99dcde4a168cb98d6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/07479e53-7a0d-4478-8fcd-567b4cc17d1d/way_of_the_wolf_ee_knight.pdf
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_8d27d11f65a34ca7b9e33a41d486facf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/17e4c112-eacd-48fb-8229-0d6eb591ccf5/funcion_y_estructura_de_un_texto_instructivo.pdf
    • http://watusatuvor.myartsonline.com/how_much_does_an_interior_designer_make_a_day.pdf
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_544428bbcfb94844bdb4bfa8da799cfe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/896177fe-5467-4ead-932c-954284e676a8/fodisovapeguxabudomon.pdf
    • https://uploads.strikinglycdn.com/files/1d457bbe-fa29-4836-b229-746f628ab2cc/botofolaxuvutobi.pdf
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_3dcd54606b5f474c8f7673df6ebd53b7.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bc.bin
6b1886100909a5777bb30fc7b7be00bba8ed48ad5f5b392b7a0cb4783a0739ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 3016 bytes
font_01_sfnt_off0000fc76.bin
6dccc49948e4a539fbb16251bdafad3c488e1bdd19eecb698f478487b350926f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 5272 bytes
font_02_sfnt_off00010e8f.bin
0fb52ba8e8b5d4d8f8a1a6de59083eaa55d59aa55ba53ef63b62fb37a432b4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8F 11376 bytes

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