Malicious PDF — malware analysis report

Static analysis result for SHA-256 0358fff893490b46…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 18:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a28505ed81fc759638d55f82211ff6b6 SHA-1: da18d0d5f302839ae954384d1eb378fc53b191ba SHA-256: 0358fff893490b4697652067bbba543bcdcf0a5e61b442c195bc370f56fedacd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on suspicious domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to a "Spotify hack apk", indicating a lure for users seeking unauthorized software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=spotify+hack+apk+mediaf%25C4%25B1re
    • http://crawlmqyu.space/83152801334fhgtm.pdf
    • http://getdouche.xyz/filapobotubitidesbcaw.pdf
    • http://unlockdeals.shop/differentiate_between_evolutionary_and_revolutionary_changezagx5.pdf
    • http://betmoy56.com/80s_dance_music_playlist_download20qld.pdf
    • http://shopyou.online/frigidaire_refrigerator_model_fghb2866pf3bm1ia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_f2b30e4d015a4e448658ee74012d83cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/df36a90b-c3de-464b-ade9-4ac90570328e/rurolevasisix.pdf
    • https://uploads.strikinglycdn.com/files/72370ab3-a570-4d65-ac22-963e6212cdd7/raropifigikipasinurisefub.pdf
    • https://uploads.strikinglycdn.com/files/13144350-0213-47e5-9863-9105646e2b4c/resumen_libro_un_mundo_feliz_rincon_del_vago.pdf
    • https://uploads.strikinglycdn.com/files/483eda3c-b227-48be-92d5-3b199a2e1b42/wabiwumifelun.pdf
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_6931ffd6ec5940f99222313278e1b4eb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ab20c9ec-d20f-45ba-867a-d4b6e4657af3/woxinod.pdf
    • https://uploads.strikinglycdn.com/files/b54ffc74-3fc1-4708-8a76-b3fedeaaa6c8/36232574363.pdf
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_bf39612655a44325bc1d5e2c6f76e052.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dccd3342-6067-4edb-b934-9ea60003baaa/negulafabubusubo.pdf
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_cb71983d56a7494db61c0ec070112db7.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_344f51217fb24cb88cd114b710e256b2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1bee393b-c723-447c-b7e0-0c81e0b4ce1a/bigarezovubazod.pdf
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_e6f8d1aa8093453f81a553d04dece402.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d7147efd-0406-4f78-a251-1211b462d67b/gamimedomewijit.pdf
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_f13b1082a3464fa3aadd135fcb87a398.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_off0000f5ec.bin
006441c28e65387b691d811a3565296237c88d2469e7cdff5bdf3e1eb2c40ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EC 5484 bytes
font_01_sfnt_off00010882.bin
a727e1dd0ebeaea90620ef9723385f6a182d9b57f8b916b2e46aed3bc22d16e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 11100 bytes

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