Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bade8b220fe7e4e…

MALICIOUS

PDF

76.6 KB Created: 2021-02-09 19:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 66949a0814f64203421607600eb4f8d7 SHA-1: da11aa9c9745b3903c18b6d6552fda91b1be4868 SHA-256: 9bade8b220fe7e4ee8f2c095e2c0d68ccc43f2e85a1a972cd003ac46bfb7738d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of embedded URLs, many pointing to disposable hosting and utilizing UTM parameters, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate an attempt to redirect users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=diamond+club+level+minute+maid+park PDF link annotation
    • https://cdn.sqhk.co/vaxarogajib/kiddKgd/animal_sounds_game.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/9ytjdhf/dirt_track_go_kart_racing_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_60108b12a73ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60146b6053556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_5ff2be434d1bf.pdfIn PDF document text
    • http://depalowivejal.iblogger.org/adobe_after_effect_cc_2016_bagas31.pdfIn PDF document text
    • http://wuzejava.22web.org/91813621374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fcb3a38aea7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_5fd0f013e1d92.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/XLeFgjs/wazavigovudukatasupajok.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/gZgeebz/pipe_head_game_haunted_house_escape_room.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd9639db301d.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/hefVhMW/42283995252.pdfIn PDF document text
    • http://hotloveme.online/374202396227sanf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_600fd58b6632d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_601f0d1427c09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rasunafosav.epizy.com/verore.pdfIn PDF document text
    • http://kazizalogovake.rf.gd/router_table_circle_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 5184 bytes
SHA-256: b2117437da32ceeb580ece4cc6b28b0a4656d14f983b9982c978a1a7cffdce49
font_01_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 12012 bytes
SHA-256: 19c08b0ff99504193bf208f3e376201ea5d889368a5b4b6f359ba233d7a68a99
font_02_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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