Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4b507f8217332a…

MALICIOUS

PDF

76.7 KB Created: 2021-05-31 19:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fb4b272231bb3083c669e7d84df1190f SHA-1: 98d1ab04777a45aeb934323cb907a8addfc4ab21 SHA-256: fc4b507f8217332a39e7f103373e797598f899955f7153952bbb149eb0ce62aa
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 0.9991

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://queure.ru/pbw?utm_term=what+is+the+correct+weight+for+height+and+age PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485828/normal_602fdcaa67b48.pdfIn PDF document text
    • https://xamuzufoka.weebly.com/uploads/1/3/4/8/134893590/2199348.pdfIn PDF document text
    • https://vuduvanum.weebly.com/uploads/1/3/5/2/135299266/wuripodofige-jigejuvu-nepezugojodifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fe5d2c9c0180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_606726463cf93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_606e50d0de168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_602343140863d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedetuwi.pbworks.com/f/fexopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ef5251-e5f6-4001-8911-8b8b8b5dcfe9/loximimopisewubopiwebifa.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/xedujebapajebu.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/stick_fight_archer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074e4b04-2ec4-496f-825e-cc8f19a5e588/sivapuranam_in_tamil_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9711138d-0072-4fa9-b9d5-32e09cef2187/hours_ap_style.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144421242/castles_and_crusades_players_handbook.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144413619/33539284728.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/vabovokifonasoxo.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418446/voxukufosegalaluzogitowet.pdfIn PDF document text
    • http://zegugas.pbworks.com/w/file/fetch/144411456/10109408561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0bb0fc-2bda-4257-b108-455c8a124f65/marine_corps_fitness_workouts.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144414780/61052294162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd436fe4-bd8d-47ca-9df3-a8756d8c8fe3/netgear_wgr614v7_manual_portugues.pdfIn PDF document text
    • http://xovelezid.pbworks.com/w/file/fetch/144415758/26988833506.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/f/1394092987.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/68024950081.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_off0000ebfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 5356 bytes
SHA-256: e89afc3db270c49a9de389a3bdb6b9d6851cdd9f93c8998c4628a790d1dd7328
font_01_sfnt_off0000fe48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 11224 bytes
SHA-256: a2c74707fe0733525d6ae46efbead8946d0446f178eede37abf7329a6a023a04

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