Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2afe398b1e6f26…

MALICIOUS

PDF

86.2 KB Created: 2021-04-06 04:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06ec8f4f5f7cebe92d2427a6687a00ef SHA-1: 22b8e964cfb796440cc85b8dd615f97a8d0b7283 SHA-256: ae2afe398b1e6f262c735f072a062fb89d0cf1e30a3f475cff4a165399ad3ffc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to zajinet.ru, which is flagged as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=liberalismo+politico+john+rawls+pdf PDF link annotation
    • https://cdn.sqhk.co/fodexuxefeba/mjfHAhd/valparaiso_vikings_football_score.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/ricgeid/royal_farkle_kingdom_hearts.pdfIn PDF document text
    • http://kaxitijidopu.iblogger.org/snow_white_and_the_seven_dwarfs_story.pdfIn PDF document text
    • https://cdn.sqhk.co/lupananonutu/YxtgjFJ/joindre_2_gratuit.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/w5jbFS2/fenamemanufukufu.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/idphcSW/40042916017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/evacuation_slide_sheets.pdfIn PDF document text
    • http://wedofisirix.epizy.com/gesosijegazowovujejapami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9b0812-91ee-47e4-8816-61a35f3de5a2/titanic_musical_script.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_e66b3996dfe3464698498b6bdcb6e67f.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_969fe6f8277c4a28b6595b14f3a1c33c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/wiponewimazidote.pdfIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_cc263cf27dff44d2bf328422795de5d3.pdf?index=trueIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_cc1064715ba74828a4878567d1b3c851.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3003f2e2-b18d-4cdb-880a-54fd4456a8ca/garmin_62_gps.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/80483933257.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/how_to_take_apart_a_lc9s_ruger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20af43f4-d795-466b-9a42-a1799214c6d4/power_pressure_cooker_xl_vegetable_soup_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/zakenanixulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1f5934-5de9-40d0-90bc-856f4616d3e7/lg_inverter_direct_drive_washing_machine_manual_wt-h550.pdfIn PDF document text
    • https://321e46d8-a3e9-4523-905f-b0dcd1dcb7ef.filesusr.com/ugd/29fbc3_7ea7371f570d486897a042e4b7790db6.pdf?index=trueIn PDF document text
    • http://dorofudi.epizy.com/2020_calendar_time_and_date.pdfIn PDF document text
    • http://ruditofejew.rf.gd/teoria_del_aprendizaje_social_bandura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2540fa3b-ee7b-402d-8e85-0930849b220c/momawikunikumikez.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_off000106c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 2960 bytes
SHA-256: 00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c
font_01_sfnt_off00011136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 5644 bytes
SHA-256: 1610bee2f6aaa4c1d9dea75f1d77c2dfff01a93da059d7ee4c7b077d48aa3c85
font_02_sfnt_off00012450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12450 11820 bytes
SHA-256: 1afb432bd8c2820ec4b75ad1ec4d6ee73994ecf9f0e0bae1e99f184bb4d33382