Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75ffddb164639b1…

MALICIOUS

PDF

86.9 KB Created: 2021-04-01 23:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa145a6141f64358993df63391ce7b7c SHA-1: 9ae2dc3123d83b7531a4bc0a232c53c79cff991b SHA-256: b75ffddb164639b131e85d9ab6f00b361290606e6867e849fbbdafe19b3783c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/strik?utm_term=line+6+pod+go+vs+helix+stomp PDF link annotation
    • http://kefijor.mygamesonline.org/data_analytics_course_outline.pdfIn PDF document text
    • http://lalevuw.mypressonline.com/jovuwokijowumobe.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/physiology_of_hearing_steps.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/45882679256.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/7jfieYi/toboxexinopaxor.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/hxmJiif/psycho_bandit_mask_borderlands_2.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/what_to_do_if_my_ninja_blender_wont_work.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/96108124606.pdfIn PDF document text
    • http://fatunatet.getenjoyment.net/bin_sachivalay_syllabus_2020_maru_gujarat.pdfIn PDF document text
    • http://fatimuze.22web.org/converting_si_units_of_measurement_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6a3597-8db0-47b9-8033-20ccf227570c/nissan_forklift_parts_breakdown.pdfIn PDF document text
    • http://dodarululi.epizy.com/blink_182_self_titled_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd7a201-3486-4249-8c90-43d1b2db14d3/who_makes_huskee_snow_blowers.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/94919831971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07edb06-b26f-4271-9740-734d3bc1e0cf/fios_gigabit_router_yellow_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32fb0ad-b28a-4ee9-ae1d-404b54fc48b6/bonomu.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/herman_bavinck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd61403-72fc-42cc-9299-009cc8cd80be/28428206289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc33d91-7f1d-46fb-8561-b1c0de1cf7f5/depik.pdfIn PDF document text
    • http://minegavanifur.rf.gd/16308160844.pdfIn PDF document text
    • http://zeduxekuvuwexu.epizy.com/50181829632.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/adobe_converter_free.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_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 5292 bytes
SHA-256: da63068f71961bbba3a9d6ad50c6a6f17dab87e8d592a530ce5e3034776093f0
font_01_sfnt_off00012794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 10992 bytes
SHA-256: 6da3cc7f54034babc37244b81db54a1e48b4eec92977456d55edae3e7887be91

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