Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae197ff6d0bc031b…

MALICIOUS

PDF

83.6 KB Created: 2021-03-14 23:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0cdbffb92e695be37cfcc42c0f4f9a9 SHA-1: 77f411f2747d366bac7b9c0d44b6edd8e30266ff SHA-256: ae197ff6d0bc031bee29d0869cb2be7823e47bb272351100d07adbca016d0ec3
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, such as 'https://zajinet.ru/wix?keyword=survival+games+mod+apk+free+download', suggests the document is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying a link farm structure on disposable hosting, commonly used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=survival+games+mod+apk+free+download
    • http://gepokupaburorew.mywebcommunity.org/what_is_the_climax_of_prisoner_b-3087.pdf
    • http://lezobul.medianewsonline.com/81949894022.pdf
    • https://cdn.sqhk.co/xudekutof/chfjgQY/world_sporting_events_may_2020.pdf
    • https://cdn.sqhk.co/nukusigemug/cjjEOia/zolugazedimukug.pdf
    • http://winovigamaj.mygamesonline.org/sazasalesidomagipe.pdf
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/fb04f9dcf64.pdf
    • https://cdn.sqhk.co/kupujape/hiTggHF/stickman_free_fire_survival_battleground.pdf
    • http://obmenkalnr.online/susuvu188yb.pdf
    • http://gazizelasama.getenjoyment.net/dakidoserub.pdf
    • http://orbitan.fun/1996_jeep_cherokee_for_sale_washington_state5lf4d.pdf
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/aa0ed9fde.pdf
    • https://cdn.sqhk.co/famuxina/hBHMFje/6_infinity_stones_meaning.pdf
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/3097282.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jikelaxapexa.onlinewebshop.net/96_ford_ranger_ignition_problems.pdf
    • https://s3.amazonaws.com/sinadi/ctm_hs_2800_manual.pdf
    • https://s3.amazonaws.com/tiluwisulepam/48676142510.pdf
    • http://bugenerefajujus.atwebpages.com/what_is_the_meaning_of_star_crossed_lovers_in_romeo_and_juliet.pdf
    • https://s3.amazonaws.com/luworizesupox/gudefasitalaxire.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e589.bin
dfbbf1b8616aeab3a240d675e20f428bf9c511f08ba47030bc997487c75a9e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 5484 bytes
font_01_sfnt_off0000f824.bin
79ded9ecc4bb3209a8ba10ae25a6078e51187e2f02afb86a7620ae3689a88321		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10912 bytes
font_02_sfnt_off00011ddd.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 16092 bytes
font_03_sfnt_off000132a5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132A5 4324 bytes

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