Malicious PDF — malware analysis report

Static analysis result for SHA-256 b423199275186f18…

MALICIOUS

PDF

85.3 KB Created: 2021-04-21 02:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6679c51fbf0a79f49f4860f5d1670f88 SHA-1: 41083fed9b5e6b58498800e8ccd56a5e81350cb9 SHA-256: b423199275186f1825766342d526230850989da5a201baa0efb8094dfc6df859
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 0.9997

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://kuzutuzo.ru/strik?utm_term=las+7+explicaciones+del+himno+nacional+de+honduras PDF link annotation
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/1051169.pdfIn PDF document text
    • https://rajivuwos.weebly.com/uploads/1/3/4/3/134398668/7405144.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/2571937.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/kamabokag.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/Cjihdja/stackers_mini_jewellery_box_blush_pink.pdfIn PDF document text
    • http://zumedemuruva.22web.org/sukitilopejawoma.pdfIn PDF document text
    • http://justiciaforjustice.com/boss_micro_br_80_drivermz3vc.pdfIn PDF document text
    • http://detonic-deutschland.website/troy_bilt_xp_46_inch_deck_belt_diagramotcuc.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ghjjwgc/38261789220.pdfIn PDF document text
    • http://gisejol.iblogger.org/sozutelobenorarasow.pdfIn PDF document text
    • https://moxuwurenawa.weebly.com/uploads/1/3/0/8/130874588/2553446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizonizop.rf.gd/53227906628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d08d4e-0e05-42de-bdbf-f9e73bc348c4/steel_arctis_fire_and_blood_reviews.pdfIn PDF document text
    • http://fixomixipewuwa.rf.gd/90492474014.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/palabilisemupeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664f691b-e07e-4229-8bb0-264744566ed1/xatovazudubupomunutepajud.pdfIn PDF document text
    • http://feriwodopumumo.rf.gd/gizulozejebovosuxize.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/14211035586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e83f59-3354-4930-adeb-52435575c28a/tinururufabawad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0418949-c0a7-4daa-8893-289ab96d9a2d/interior_designing_courses_online_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/66357031257.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 5400 bytes
SHA-256: 51706316d9d6f13a0f8bbd357fb331a0cb05739c8c969176e56942db1a10a905
font_01_sfnt_off00011c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 13000 bytes
SHA-256: b6426e0f8367c43138a28ed3fbe23553ac96cc9bb8ed24e85df08b04ab268765

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