Malicious PDF — malware analysis report

Static analysis result for SHA-256 1541a455a4706cb6…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 19:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02fb853e687bd6180e7f0038386555a6 SHA-1: b5342bdeda66c8af89cdef54d4c09fdf42be46b3 SHA-256: 1541a455a4706cb6fb516261478e4a9d5b2117a1414120614b230271ea56826a
126 Risk Score

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://crophysi.ru/award?keyword=celestial+navigation+pdf+free+download PDF link annotation
    • http://filemarker.store/e_bikes_for_sale_at_walmartj1cqc.pdfIn PDF document text
    • http://myyshooop227.site/nipalilajimubudupol0tty.pdfIn PDF document text
    • http://paselon.getenjoyment.net/puwabufugilopuzederarawiv.pdfIn PDF document text
    • http://optamorem.com/garmin_52_with_traffic_reviewsdypx3.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/descent_avernus.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/ljhifhi/ducks_unlimited_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/c0Ugcig/13672288391.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/how_to_handle_a_police_interrogation.pdfIn PDF document text
    • https://sujuwezel.weebly.com/uploads/1/3/4/4/134486010/domujetuk.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/25168294927.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/iyhejQj/nuxudezetivakawogudo.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/the_beggar_s_opera_italiano.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/wujez.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/hackers_heroes_of_the_computer_revolution_by_steven_levy.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/giifih1/vefamoradewomiwuresuwij.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
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_b456d7932a4f41dbbe36cf8288ee1de8.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_5948f867df274f5d9638f0e446811cf2.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_ded7554fc78b48c29470b487c8f8a4d9.pdf?index=trueIn PDF document text
    • http://gujimosodaza.myartsonline.com/wegajugowutegotifazib.pdfIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_ec3a1f411cf34060b662579442b75394.pdf?index=trueIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_796daa921841488aa7656ee33b71e37e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41D 5172 bytes
SHA-256: 51b032dbabd2c0a895a9bc4876612ca22db036381936042a6c1da35b54b615be
font_01_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 10720 bytes
SHA-256: ba93eb35b442cf46dfe3c098c961805aaebb05e495dad485c403cf00ae1c6b4a
font_02_sfnt_off00011a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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