Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06b5b52ba75f794…

MALICIOUS

PDF

68.6 KB Created: 2021-04-08 05:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce11100038c73984b03911dc4336346e SHA-1: 4bd8f95fbd83ffad40dab4503929387136813b34 SHA-256: e06b5b52ba75f79465d8d8f44f18c4a212d47b29f3bba41453573e603210e105
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious content, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=balancing+chemical+equations+gizmo+answer+key+pdf
    • https://mesemexuganu.weebly.com/uploads/1/3/1/4/131437531/6766552.pdf
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/2721829.pdf
    • https://lajibomigijiku.weebly.com/uploads/1/3/4/5/134587714/c6efef.pdf
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5ffd8341f26e6.pdf
    • https://dumuwikodopod.weebly.com/uploads/1/3/4/4/134458554/be5ab611d7d7c16.pdf
    • http://bitsracing.net/rendering_in_pen_and_ink_free_downloadrjg2j.pdf
    • https://cdn-cms.f-static.net/uploads/4368477/normal_6015a5378f787.pdf
    • https://wodarobasuk.weebly.com/uploads/1/3/5/3/135300597/3846175.pdf
    • http://osmosiotzs.fun/is_black_and_decker_going_out_of_businessecbuy.pdf
    • http://uablog.website/how_to_use_multiple_midi_controllers_in_logicc7o2f.pdf
    • https://cdn.sqhk.co/fimegasaz/ghjUUWt/sujakokow.pdf
    • https://cdn.sqhk.co/sufokorume/gfifBXA/just_draw_game_level_33.pdf
    • http://speak4pro.com/minecraft_horse_stable_pea0k6s.pdf
    • https://cdn.sqhk.co/fawabanof/Rqvhghi/pokemon_go_plus_target_australia.pdf
    • https://jazezuko.weebly.com/uploads/1/3/4/3/134389352/tubax_zebot.pdf
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/7131394.pdf
    • https://cdn.sqhk.co/regavebike/fnUZIjg/wememudiwilelefusajad.pdf
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6012811a2c84f.pdf
    • https://cdn-cms.f-static.net/uploads/4372361/normal_60290893beab1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/widetunipet/formal_region_definition_human_geography.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/ti_google_chrome_mi_nht_cho_android.pdf
    • https://s3.amazonaws.com/gomaxod/camera_effects_for_pc.pdf
    • https://s3.amazonaws.com/paxivogedewilu/94254833572.pdf
    • https://s3.amazonaws.com/nefomojuwet/75563973999.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cddc.bin
f3a70ae7172175e4c09263bebd503c2324fde979609126758874c8e17cc14e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDC 6052 bytes
font_01_sfnt_off0000e264.bin
e7783636e886f0cc143bc90efdb4ec04b5f5ab9db15f3b78f704c4e8a490befc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 10396 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.