Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88f758cd042487c…

MALICIOUS

PDF

98.6 KB Created: 2021-03-31 06:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29580110d04f6f757e03836357f3e935 SHA-1: a082214fbd4e76b8f1c2277683a21f925b0521c6 SHA-256: e88f758cd042487c28ed7ec2e5b4a706513b0ece7f131bb89c51934807649c30
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded URL `https://kuzutuzo.ru/strik?utm_term=is+arabian+nights+the+same+as+1001+nights` is a primary indicator of malicious intent, likely leading to a phishing page or further malware distribution.

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://kuzutuzo.ru/strik?utm_term=is+arabian+nights+the+same+as+1001+nights
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5fd9de5540798.pdf
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/jakonutuvimuruwe.pdf
    • http://fakadod.iblogger.org/livir.pdf
    • https://nebaxasokawi.weebly.com/uploads/1/3/4/6/134608628/99ab425adf.pdf
    • https://cdn-cms.f-static.net/uploads/4426820/normal_601afa28151e8.pdf
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fef9a1092cdb.pdf
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/pisopupun_ruvewareloji_kiravepelul_xofaz.pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/riwebebufafal_juluron.pdf
    • https://tazapupexon.weebly.com/uploads/1/3/4/6/134634001/vexesir-nezevunejepa-neniser-duwenibexiwew.pdf
    • https://cdn-cms.f-static.net/uploads/4412382/normal_60303cedecf99.pdf
    • https://static.s123-cdn-static.com/uploads/4412591/normal_6008199fe2c65.pdf
    • https://cdn-cms.f-static.net/uploads/4445125/normal_6011a7f280bb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lewuli/bizijaxol.pdf
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_e54a213212dc4f0aa4df16b7f1f2377e.pdf?index=true
    • https://s3.amazonaws.com/sirilagewuga/zulimatizogorixagemo.pdf
    • https://s3.amazonaws.com/sugosubexez/how_to_harvest_ruby_red_lettuce.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_ff9cbf210b2c438bb7cacf44f0961baa.pdf?index=true
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_d1259f19c361466a8afc53fb5ef43396.pdf?index=true
    • https://s3.amazonaws.com/fopalew/project_almanac_tamil_dubbed_movie_free.pdf
    • http://bawubaj.epizy.com/swanson_speed_square_instructions.pdf
    • http://rezopokus.epizy.com/joan_rivers_show_episode_guide.pdf
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_0c2ece5e58ca4c60b98ce80ee93f852d.pdf?index=true
    • https://s3.amazonaws.com/gowebabuxogiro/85328369292.pdf
    • http://silimafimutoj.rf.gd/bargaining_for_advantage_negotiation_strategies_for_reasonable_people._download.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_off0001420f.bin
70d8a1bb70715e5aebbf4fa3d2b0a80b064fd51d8d26dff4c7d7b5567c9d1ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1420F 5336 bytes
font_01_sfnt_off00015413.bin
7a768f8e7cb777dab0d9a2169ea6bdffe598d18eac66484d1fd46277873c88c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15413 12460 bytes

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