Malicious PDF — malware analysis report

Static analysis result for SHA-256 5891cace088be48f…

MALICIOUS

PDF

93.6 KB Created: 2021-05-11 23:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f39e4f24bf906ce76d1e327b91947315 SHA-1: c2c2ed4c26badce3bede923d120bc9eaed06b8a7 SHA-256: 5891cace088be48f4feadd0584f8be8ffa4d8e123aec1d3fad975f7d6bdc67ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming operation. The PDF's structure and embedded content, though heavily obfuscated, are consistent with malware designed to redirect users to malicious sites for further exploitation.

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://midufefew.ru/strik?utm_term=he%2527s+here+eddie+james+chords PDF link annotation
    • http://shtangelkipokupkiitd.online/nopif0ylju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495839/normal_60540d851baa4.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/jcjedVw/major_mayhem_2_gun_shooting_action_mod_apk.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/85942032278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_6024c99b9ad8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60220fc65674c.pdfIn PDF document text
    • http://goodshopsales.xyz/jewewukijolalv3qex.pdfIn PDF document text
    • http://dududuw.mypressonline.com/lepitoporugon.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/ipVkChb/tactical_rpg_android_games.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/17784500003.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/jeahiwS/plants_vs_zombies_game_free_download_mac.pdfIn PDF document text
    • http://difavusimope.iblogger.org/business_in_nigeria.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/GhggfZm/star_wars_episode_1_pinball_lightsaber.pdfIn PDF document text
    • http://berasowugixo.mywebcommunity.org/74762621874.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/jbWhggi/sejukole.pdfIn PDF document text
    • http://magexaxajatadog.getenjoyment.net/16023781221.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/anthropological_foundation_of_education.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60152b924474d.pdfIn PDF document text
    • http://salonly.xyz/do_bernese_mountain_dogs_have_an_undercoatgku4i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_6046dd674ac12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wavivexudis.epizy.com/general_partnership_agreement_sample.pdfIn PDF document text
    • http://sazoser.myartsonline.com/glencoe_high_school_chemistry_textbook.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 5216 bytes
SHA-256: b9054c806d5868b13fe59f8ca5d24ec4348ccc8b2f9980ed6d848385b8a6167e
font_01_sfnt_off00013cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF6 13924 bytes
SHA-256: 05c36e06d7934dc708ea715f8e93d4277091c238c40dd8867c2c7ab76291d4a2

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