Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b75e8084ff95bc…

MALICIOUS

PDF

86.3 KB Created: 2021-04-08 07:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd870041199799c745de54f2cdcc0ab SHA-1: 0f750e8f29dd0546aa64c6139816d69fec58569a SHA-256: 36b75e8084ff95bc044788c1057bd6914f642dbacb25bdd4acb915c1ba81330c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/strik?utm_term=gone+with+the+wind+book+for+sale
    • https://cdn.sqhk.co/jebanufebejo/wfiiicM/the_hundred_years_war_and_the_plague_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fe369ddec82c.pdf
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/7878146.pdf
    • https://cdn.sqhk.co/puxezuxivas/0pbgcgi/pubg_wallpaper_1920x1080_hd_laptop.pdf
    • https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/jajotu.pdf
    • https://cdn.sqhk.co/zafilivopupu/fEiffhd/garfield_movie_in_tamil_dubbed_movie.pdf
    • https://cdn.sqhk.co/duxadikoti/e5agepK/jolelomarebe.pdf
    • https://cdn.sqhk.co/fowipovoji/Hjd4a8m/dirt_bike_wipeout_2018_abc.pdf
    • https://maruvape.weebly.com/uploads/1/3/4/8/134854924/2526693.pdf
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/jagogo.pdf
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5fc9aaed38fe4.pdf
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/f62455.pdf
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fc91c39da31c.pdf
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/fe1cb1eb9.pdf
    • https://cdn.sqhk.co/dawiredi/cibJbja/dingo_dog_names.pdf
    • https://wavigijaburejuw.weebly.com/uploads/1/3/4/5/134588531/8742276.pdf
    • https://cdn.sqhk.co/kawurefeki/BvLjbjd/fepiwupidet.pdf
    • https://static.s123-cdn-static.com/uploads/4475875/normal_60026efdde85d.pdf
    • https://cdn-cms.f-static.net/uploads/4467038/normal_606546b4c3a59.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sowewazulejewi/the_standard_high_line_hudson_studio.pdf
    • https://s3.amazonaws.com/gazivemon/how_to_use_bialetti_manual_milk_frother.pdf
    • https://s3.amazonaws.com/kawotexulozax/81388404389.pdf
    • https://s3.amazonaws.com/vexosafugunu/miguw.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_off000110f6.bin
8b178699c166893f03c793233ff5f11408fce91f849d82079e848bc82af35606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 5324 bytes
font_01_sfnt_off00012320.bin
ec1eddd1592520270d12a69050bc41ebff59cd934c57f9a3add808148590e2be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12320 12300 bytes

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