Malicious PDF — malware analysis report

Static analysis result for SHA-256 788e7ac35a1f3486…

MALICIOUS

PDF

83.1 KB Created: 2021-03-17 16:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b82578f32d2774044b29d25f235e94c SHA-1: 120f7883523f589c53ec0d02e0742dbf6e99f9b0 SHA-256: 788e7ac35a1f3486d22f71d40b83e64147dbdf7b96cf7789b201426f3c275888
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to reference a magazine title, indicating a lure to entice users to click on the embedded URLs.

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://bologen.ru/award?keyword=revista+boticario+pdf+ciclo+8+2020
    • https://cdn.sqhk.co/rolileduvof/iedyjjd/godud.pdf
    • http://internet-babki.ru/how_to_turn_on_blue_light_on_switch_pro_controller076x6.pdf
    • http://larijasetejupaz.mypressonline.com/core_clinical_cases_for_medical_students.pdf
    • https://cdn.sqhk.co/fusureviweki/cNigFjc/adobe_flash_player_9._0_android.pdf
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5ff954464187c.pdf
    • https://static.s123-cdn-static.com/uploads/4384471/normal_6006900360de1.pdf
    • http://skidki-day.store/top_100_station_indexmlk97.pdf
    • http://presalle.xyz/dungeons_and_dragons_free_campaigns7028t.pdf
    • https://cdn.sqhk.co/bidogefapo/ic1Tihq/42002912333.pdf
    • http://fisujerekuvij.getenjoyment.net/musigorifupupamatipo.pdf
    • https://cdn.sqhk.co/rejapugu/pgdgdjg/xufuxulotemaguv.pdf
    • http://fulukegoror.getenjoyment.net/what_is_the_oldest_history_in_the_world.pdf
    • https://cdn-cms.f-static.net/uploads/4387712/normal_60278c02c6f6b.pdf
    • https://cdn-cms.f-static.net/uploads/4383689/normal_602090bd8b7bf.pdf
    • http://cabinetshub.xyz/where_to_put_pads_for_tens_unitxnq3r.pdf
    • https://cdn-cms.f-static.net/uploads/4403672/normal_602287c654a45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/021a362b-1315-416f-9f52-251c8a6b7311/lexozofokobuvusomupa.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_72f4b8896ab947498e1bac86fbb031d3.pdf?index=true
    • http://wudemexa.myartsonline.com/nj_driver_license_not_for_real_id_purposes.pdf
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_18fd4e4f694b4c28b42cd96b43d4bc1c.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_9347b7897d9142e9a75b4ec35c2b924b.pdf?index=true
    • http://ziwemasux.myartsonline.com/britax_marathon_clicktight_rear_facing_height_limit.pdf
    • https://uploads.strikinglycdn.com/files/3c02fa6f-6400-4e26-a315-ce7058c3adfa/raxevupitafojapolub.pdf
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_e9bc559ae3b94be8b79e1355fa6b69a3.pdf?index=true
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_d4bdba8b3569402a91d28a4422698ae3.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
    • 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_off0000ec57.bin
b9f2a184fc40f0884b2c864e50e4b9f619f39a611e6bdcd6378d1c27a4a15301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 5824 bytes
font_01_sfnt_off0001003a.bin
9c88e61e382ae67e8e41b8c2a1b5cf90730256975ca425a870b96922b8ed3999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 12292 bytes
font_02_sfnt_off000126c1.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126C1 16312 bytes

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