Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedd24ac459b55d1…

MALICIOUS

PDF

85.5 KB Created: 2021-04-15 20:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ccd7b7212a931e81d9f9af086f34a3a SHA-1: 75fd571e74e88bd699e3d73bbbe2f9640f78faac SHA-256: dedd24ac459b55d1fdb3ab1ac09d443fb0d5bcfccdbfe98f45bfa177f42c7897
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a lure related to a movie sequel. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=is+there+a+sequel+to+jason+and+the+argonauts
    • http://bluebadgeapproval.com/marantz_sr7010_specificationsdxtne.pdf
    • http://nikibolerobika.getenjoyment.net/depiruxaxe.pdf
    • http://meblik.su/42458072567wuiug.pdf
    • http://trafikcezaodebayisi.com/ziravotusafiveled20d9.pdf
    • http://selozufuwadapuw.66ghz.com/body_boss_method_download.pdf
    • http://idealica-ufficiale.site/biodata_format_for_marriage_muslim_boy7ghwj.pdf
    • http://helpverifedbadges.com/69678089509cz77k.pdf
    • http://kufafukedexepix.mygamesonline.org/selling_skills_for_medical_representative.pdf
    • http://gomijojupi.iblogger.org/68911006822.pdf
    • http://scm03.ru/download_script_diamond_ffdi0ka.pdf
    • http://weinmvc.net/gypsum_board_false_ceiling_installation0n4fe.pdf
    • http://teachost.com/bukunmi_oluwashina_ranti_mi_videomdw8o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_03a89f2dbd834a21a84484c3cfd05cd4.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_505fb9a562b14168941e15ee9557fc4e.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_8c1e77a84c5640d99529f09830c65769.pdf?index=true
    • https://s3.amazonaws.com/wovugi/jirojob.pdf
    • http://fekugulivajul.epizy.com/86779688050.pdf
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_2a99bb256ed1469ebff0841ae414490e.pdf?index=true
    • https://s3.amazonaws.com/jokotaziweluge/heart_touching_love_story_song_new.pdf
    • https://s3.amazonaws.com/mukut/lepavomosotuvunoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010288.bin
4fb7ad035c2ad99db7dd0f61411e8e34f9a8f583a0d88f583e11207166137498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 5060 bytes
font_01_sfnt_off000113a8.bin
7c7f3a9560094e2ded69cef1fff094a3d5cf74ce664398256b6a6910378bbd0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 11316 bytes
font_02_sfnt_off000139f2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139F2 4324 bytes

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