Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcc1f9af9326124…

MALICIOUS

PDF

73.3 KB Created: 2021-03-26 00:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9d62eb67979c1374fe177f03ff09654c SHA-1: 1213ee3c87380b31af48104f146bc86cfb51c80d SHA-256: 8fcc1f9af932612448e8f8b59c788486b6ea9a3dbd95c33ad63e400a41ced8db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/award?keyword=air+brake+system+troubleshooting+pdf PDF link annotation
    • http://ziwegiwe.iblogger.org/lagu_batak_house_musik.pdfIn PDF document text
    • http://gratoramaa.space/888905929134uj0m.pdfIn PDF document text
    • http://chempion.coffee/fupuwodg1d69.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/bixejixojogi_gowos_levinewexe_jaledew.pdfIn PDF document text
    • http://bestrongbyg.com/emotion_power_assist_wheelchair_wheelsxyhsb.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/2419308.pdfIn PDF document text
    • http://wegansit.space/sukugejimafrqfum.pdfIn PDF document text
    • http://bettermoneytips.com/autocad_commands_with_examples_free_download1m2re.pdfIn PDF document text
    • http://xusegerobexusag.iblogger.org/red_hibiscus_flower_images.pdfIn PDF document text
    • http://onenature.space/zumuvolaxozezapusakejhn58z.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/zazok.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/when_you_are_wrong_quotes.pdfIn PDF document text
    • http://mailedflkf.site/sony_icf-c1pj_service_manualsylh3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legesiliv/funai_zv427fx4_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/94799769364.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/how_to_stop_quicken_2017_upgrade_popup.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/how_to_adjust_carb_on_husqvarna_128ld.pdfIn PDF document text
    • http://bimofuvuku.epizy.com/research_methodology_books_in_english_literature.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_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 5748 bytes
SHA-256: 1e3ae309304b3b51b52324498409e03266d57c55195518ea8e2583035057cc34
font_01_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 10508 bytes
SHA-256: b4af5b6de40c40f0bdc5ed0349e4bb2b19c8d83f3d133dbd5193eb58c46fafd6

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