Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdddaa9924c95534…

MALICIOUS

PDF

79.1 KB Created: 2021-03-28 23:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2dfbf1890a45d313e85ebb8b8a44561 SHA-1: 7b6b37472e8007b21500ad9a2e2c9c1d2e1c844d SHA-256: bdddaa9924c95534c9ad6b3c333e1ec7facbf4adef0b9d567bc098852dbdd4b0
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for downloading unwanted applications or engaging in phishing. The document body, though heavily obfuscated, contains references to 'mod apk' and 'unlimited money', aligning with a lure for game cheats or similar potentially unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=tap+titans+mod+apk+unlimited+money+and+gems
    • https://cdn.sqhk.co/xekobigi/Shbgdhh/corneregel_ulotka.pdf
    • https://cdn.sqhk.co/gasariba/geU5Uhd/evolution_2_battle_for_utopia_hack_mod_apk.pdf
    • http://wavujilipazi.22web.org/pikofumojokunenujobidu.pdf
    • http://sizegivip.22web.org/66867768467.pdf
    • https://cdn.sqhk.co/jatobeguji/Fgijhgf/wonder_girl_resurrection.pdf
    • http://tafuxasomup.getenjoyment.net/57031576081.pdf
    • http://bivaxosufuxibo.mygamesonline.org/aptitude_questions_and_answers_for_freshers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_56cac00e15f6444d9f4a68fc86a1afcf.pdf?index=true
    • https://s3.amazonaws.com/xukirizugukugi/will_cyberpunk_2077_work_on_xbox_one_x.pdf
    • https://uploads.strikinglycdn.com/files/bd21d6a8-734a-4426-9a87-c25c397b4abd/52572040139.pdf
    • https://uploads.strikinglycdn.com/files/d1f12642-c3fa-42fa-8630-eae24661d018/dejakomigutoditelitowi.pdf
    • http://rabelame.atwebpages.com/58762439454.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_a2a826575d46440c86dc0f1aff26a8e9.pdf?index=true
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_6d8978f1c2f841eea7733b4aadb450dc.pdf?index=true
    • http://pubopunabe.rf.gd/venedalefowe.pdf
    • https://s3.amazonaws.com/kimone/kidde_smoke_alarm_green_light_chirping.pdf
    • https://uploads.strikinglycdn.com/files/c060ace9-a461-4629-9e0f-6c4b3dd5d0e6/25533553795.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_2bceccb6f7e04cf9a8480b208bd37ef9.pdf?index=true
    • https://s3.amazonaws.com/panalipolifod/atrial_fibrillation_guidelines_2014_executive_summary.pdf
    • http://xujided.onlinewebshop.net/folip.pdf
    • https://s3.amazonaws.com/tipikaxe/wubejugamogol.pdf
    • https://s3.amazonaws.com/jujojomojemiz/fofakiloxipu.pdf
    • https://uploads.strikinglycdn.com/files/22088f37-ae98-4816-9d22-57e90cb56c49/wendys_menu_nutrition_carbs.pdf
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_2ee778c2537b48b4a44cff5f8e7e6c72.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_off0000f0ff.bin
0560d4ae6f61c25b86c924502d9a8d82c8502fd7c9936177dcf66883d48d6e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 5296 bytes
font_01_sfnt_off00010306.bin
ddb917cb5112d74dfd3f18396db30897ec1823bc20a0db6637ba8980e83c8f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 14252 bytes

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