Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdccec03c6aeedcc…

MALICIOUS

PDF

74.4 KB Created: 2021-03-29 19:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a8dc1843afaf8294d4bd722ca8632f5 SHA-1: e711c650cae456d9ee6be62f643f3ba9fc51acf9 SHA-256: bdccec03c6aeedcccd7c763eb35475b7a044d914247039f895419d33686f636f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=calendar+template+june+2020+pdf
    • http://zilitimo.getenjoyment.net/can_t_stop_the_feeling_chords_piano.pdf
    • http://jedomagisuw.getenjoyment.net/64605898956.pdf
    • https://cdn.sqhk.co/sirojenu/JS7E9hh/note_taking_app_from_ipad_pro_commercial.pdf
    • http://polobasopika.mywebcommunity.org/bin_sachivalay_model_paper_set.pdf
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/84dfc52.pdf
    • http://tapasin.sportsontheweb.net/26078582091.pdf
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/9eac2.pdf
    • http://felagem.getenjoyment.net/4583329123.pdf
    • https://ximixejolulozo.weebly.com/uploads/1/3/4/3/134351986/paverenukaf.pdf
    • http://lenulari.mypressonline.com/spironolactone_aldactone_davis.pdf
    • http://punavuvipufov.sportsontheweb.net/24326378888.pdf
    • http://dupuladusudired.mypressonline.com/79880528999.pdf
    • https://cdn.sqhk.co/gixedomawa/hdEzGje/quillbot_premium_account_ebay.pdf
    • https://cdn.sqhk.co/xonudutixova/ibdrcvv/35001639010.pdf
    • http://kazaxukiga.getenjoyment.net/how_hard_is_swat_training.pdf
    • https://cdn.sqhk.co/wezupobuwab/gr8hbSv/68913185530.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bidejepeko.onlinewebshop.net/perimeter_of_different_shapes_worksheet.pdf
    • http://dasobiviwadodaj.atwebpages.com/major_barbara_brief_summary.pdf
    • https://uploads.strikinglycdn.com/files/c31a1012-cce6-4989-9fec-6093a84e0fff/35878808870.pdf
    • http://pajupevezujugut.atwebpages.com/polk_audio_magnifi_mini_app.pdf
    • http://zipulosi.atwebpages.com/noxoretejixi.pdf
    • https://uploads.strikinglycdn.com/files/c207fb72-098c-4fd1-a1d7-b86cd2efd59e/gutukumubelo.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_off0000e7cf.bin
5d71d2e56eb061d7d0f14623cdca8c18d40d8ddfddd9695e7b2b4ea5eb451c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5264 bytes
font_01_sfnt_off0000f99e.bin
368641a376c589a8e770f38bdf4fd5daae19ceb5df3f3f6996174f5b312c13a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 10156 bytes

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