Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28a016613ae1af3…

MALICIOUS

PDF

176.7 KB Created: 2021-03-15 20:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43e7460f29833cf0d784838c82d377a8 SHA-1: dbc257a4465efdf48008f67c9ae35645806f8afa SHA-256: f28a016613ae1af38e4a161b3b4a0acbad7ad3ffdd0f73241db1929d989fe4c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'https://jumiwimov.ru/strik?utm_term=fallout+4+console+commands+best+weapons', which is likely the primary lure. The document body, though heavily obfuscated, suggests a theme related to 'Fallout 4 console commands best weapons' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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/strik?utm_term=fallout+4+console+commands+best+weapons
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600dcd77724bd.pdf
    • http://deliwubavamir.mypressonline.com/theological_dictionary_of_the_new_testament_free_download.pdf
    • https://wukavogitebiw.weebly.com/uploads/1/3/5/9/135964288/ca2dab4438b.pdf
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/8124357.pdf
    • https://cdn-cms.f-static.net/uploads/4457005/normal_602fefac5963e.pdf
    • https://cdn-cms.f-static.net/uploads/4496616/normal_6036de17a382e.pdf
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/wosuraku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d1a40d19-0b2f-4382-9a48-10349e412b64/dell_optiplex_755_graphics_card_compatibility.pdf
    • https://uploads.strikinglycdn.com/files/f488fc64-310e-4c0b-8ebc-86c02aa45e26/does_fl_studio_have_a_free_version.pdf
    • https://uploads.strikinglycdn.com/files/6e81b16d-c004-4abc-bff6-c3663703ec2d/what_do_we_mean_by_bill_of_exchange.pdf
    • https://uploads.strikinglycdn.com/files/80ed288b-2254-4834-954c-0f51382b083b/how_to_reduce_shoreline_erosion.pdf
    • https://uploads.strikinglycdn.com/files/8c52db38-a31e-443e-a282-3c9a7246101d/dubigopitijipowib.pdf
    • https://uploads.strikinglycdn.com/files/9fa3758d-ad82-4557-bb8c-b919659d4fb3/how_to_clean_reusable_mop_pads.pdf
    • https://uploads.strikinglycdn.com/files/ba0dc24e-86cc-45d8-9c96-4599b1847d36/riello_gas_burner_reset_button.pdf
    • http://nojikigor.myartsonline.com/what_are_some_key_features_of_a_commedia_dellarte_performance.pdf
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_5075ee4c536e4705a2cff500cd243c90.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d7e2a02-9f01-4520-908e-df28e81176c3/93599753875.pdf
    • https://uploads.strikinglycdn.com/files/f082b5f7-8423-49cd-83ad-e0318d528781/how_to_reset_a_sanyo_tv_to_factory_settings.pdf
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_debd694c4f9741aeb179c769f4d47bfd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027474.bin
8ea5a63dbdba71dd72dfc734506416e8c696da178c06486969a09aea18dbaee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27474 5400 bytes
font_01_sfnt_off000286d4.bin
149832db350f7c30971262a371a80926a0fe9531d60cd111e2ed019d111bdb48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x286D4 14184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.