Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05ab011e59b79d0…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 12:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da36aa6b671b920e8daf63b0ad777f59 SHA-1: d96aacd2183ef57c948bb32fa485c8a520386653 SHA-256: c05ab011e59b79d0fd1bdafd1d2389ba8545478e85daad2169ff676e8697fb6b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were extracted, the document's structure and embedded links are designed to trick users into visiting malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=which+book+is+best+for+iit
    • http://gloslides.com/63869294156xql0a.pdf
    • http://securespot.ru/63877305661bwyj0.pdf
    • http://shopsmmv.site/sibov2hq7w.pdf
    • http://qwertyujg.xyz/hero_puzzle_hack_apkdueuk.pdf
    • http://bedating.online/8990430310179mr3.pdf
    • http://odemebayisitrafik.com/radish_seed_germination_ph_experimentlsqqv.pdf
    • http://dkblogin-de.best/arcgis_10._5_eitim_kitabm80lq.pdf
    • http://kapusta.pro/9913020229v2r8e.pdf
    • http://sodahq.pro/letra_y_acordes_de_la_cancion_hosanna_de_marcos_barrientos262uc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7758c00e-0704-47c6-adaa-a29381382324/what_is_the_setting_of_a_days_wait.pdf
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_61df8362474e45c292bd6af48fc30234.pdf?index=true
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_4ec8f617795d40c18c1f16b6df7635d5.pdf?index=true
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_2098f839abd84f91a7781e32384b789d.pdf?index=true
    • https://s3.amazonaws.com/tixedujegibex/cymera_apk_free_mobile9.pdf
    • https://uploads.strikinglycdn.com/files/7dc2685d-b073-4d5e-9d41-7b7fddee9f48/how_to_fix_your_ps4_eject_button.pdf
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_ca176a6b01c24ec5b94026adcbc870dd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7b631c8-d97b-40c5-a03a-2941b99e14f6/poulan_pro_chainsaw_chain_brake.pdf
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_b12b183bb5a344fba84415ba024201da.pdf?index=true
    • https://s3.amazonaws.com/bezegoluzose/82392835126.pdf
    • https://s3.amazonaws.com/vetamedisoz/badri_movie_audio_songs_free.pdf
    • https://uploads.strikinglycdn.com/files/274c73cc-377c-421b-babc-4f77c304edfa/sat_preparation_test_online_free.pdf
    • https://s3.amazonaws.com/tikoweravisixu/vekanawuzuwi.pdf
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_2c3518855e68420394ba5731a638bef9.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_off0000e92c.bin
40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 2900 bytes
font_01_sfnt_off0000f370.bin
bb348546f56ab0b7c486b99c199260a4be12218a542fdb9585d86706cdaaae57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 4944 bytes
font_02_sfnt_off00010452.bin
8561730ea5d5c1176a3b0c453e22e827d7a9cf2af90c195daf977ba8b0808600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11132 bytes

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