Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f17ca56817e34f1…

MALICIOUS

PDF

71.3 KB Created: 2021-03-05 18:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85531138436afc795c84bf58707a1fbd SHA-1: 5d1e63f5a5971e4cc824434541e313492b0fa2d5 SHA-256: 4f17ca56817e34f1f7de0224ca0c96106225c9d132bf8f2bdfc3045d7a49d692
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 0.9993

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://pelibifir.ru/wix?keyword=schlage+camelot+user+manual PDF link annotation
    • http://9gusevshop.space/the_weatherbug_appumusw.pdfIn PDF document text
    • http://dontbeshy.xyz/dunekixuvixubipabokenoz0bus4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_600cf22eb966d.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/SiczVHV/63499992225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5fe8adcbe2313.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/ajg0pid/16281086334.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/iahhieD/kubra_ez-_pay_richmond.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/excel_2013_power_query_ribbon_missing.pdfIn PDF document text
    • http://expressvpn.store/my_server_ip_minecraftllhee.pdfIn PDF document text
    • http://pr-bux.online/icarus_at_the_edge_of_timedvww7.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/8AhcKge/20736078301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_603430885379a.pdfIn PDF document text
    • http://dirtygirl.fun/bekobukadujaruvefakalqe2j.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/XAhgUgg/super_loud_ringtones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_8a7c266cc8214774ac6e345c937727f3.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_fcd1ffe3ea934c868caed5d32fc5294e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3175c2-6b72-4a2e-b9b2-948c14921004/77829568987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247f6feb-381a-47db-8ba5-678d267efba5/holt_mcdougal_larson_algebra_2_textbook_online.pdfIn PDF document text
    • http://notaruk.rf.gd/business_communication_journal_articles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfda6d4-deae-4c33-b3ba-28e827b68c94/timegubupolafewafemuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba882d6-050c-47fe-8ba7-5191947d3c52/alan_carr_easy_way_to_stop_smoking_amazon.pdfIn PDF document text
    • http://tilixufevoj.epizy.com/ez_go_golf_cart_roof_supports.pdfIn PDF document text
    • http://musomowelego.epizy.com/what_is_a_self_cleaning_water_dispenser.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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5316 bytes
SHA-256: a8da19c4c22471e40146db1ff3f71b6e14ca2a07aa75bf440ebac553ccff6dfc
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 9896 bytes
SHA-256: 6abf514993e3df0eef105f3e76566e308f539f689b3f2f4f13f343e14aba8883

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