Malicious PDF — malware analysis report

Static analysis result for SHA-256 641c548699557711…

MALICIOUS

PDF

115.2 KB Created: 2021-03-25 01:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 838528f05ed584889ce222074cc908a9 SHA-1: 7a2acf07a3c8475c9e04917d75d316c21bf908f2 SHA-256: 641c5486995577119cda6f9b961b88835422c012596e61deadc7360b6700f842
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 0.9963

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://fokemale.ru/wix?keyword=adrenaline+bubble+booter+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9 PDF link annotation
    • http://cardio-active.site/461881778095cyz1.pdfIn PDF document text
    • http://easybranding.org/how_to_buy_a_thermal_imaging_camerafarb9.pdfIn PDF document text
    • https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/semufex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5fcc75fe3d8f9.pdfIn PDF document text
    • http://itgermany.net/2044172834052xym.pdfIn PDF document text
    • http://nutristrike-shop.ru/admiral_gas_dryer_not_heatinglo1zf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416301/normal_5ffe82718fdc7.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/67332148499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5fe8318c406d8.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/2558172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_600262f4a7e03.pdfIn PDF document text
    • http://vibemezanolex.mypressonline.com/64085074830.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/animal_kingdom_florida_map.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/fallout_4_mods_without_bethesda_account.pdfIn PDF document text
    • https://guzajemifuraruv.weebly.com/uploads/1/3/0/8/130874286/1e3852fff05dd.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/texas_shooter_manifesto_reddit.pdfIn PDF document text
    • http://kayikciakademi.com/69931897165k7qs4.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://uploads.strikinglycdn.com/files/5c50c974-b4ed-47c6-9e9f-353dc796917a/lobemupodoro.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_d4b1574d4c4b42998333376e836b3433.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_7575404349094eae86530ccbde1fa2ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b06683-4233-438c-9a32-9f5ef83426ec/53411157322.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_0897f228be524a32b689788d3cab2750.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe41aa7e-aa34-4fef-968d-299c90c0c604/how_to_remove_fireplace_doors_and_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1c7be9-ceb9-4290-861e-6269000d0fbe/oracle_database_12c_pl_sql_advanced_programming_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a5e8dd-ba37-4ffb-a4fe-0222bbad77eb/domazenovon.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 35404 bytes
SHA-256: 1218015504269c0059e6b7fe255aa835b13cc619143c366f3752986bd1261b3b
font_01_sfnt_off00016cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CBF 3512 bytes
SHA-256: 1464183ebaa74edc36fa7c2292e23720ba70f192a80a1761b783f9143787992f
font_02_sfnt_off00017949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17949 4652 bytes
SHA-256: 05e5ebbf92cc1c744ea894d3869189030019e3855e5f43f7f2a763f8679103d4
font_03_sfnt_off00018914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18914 10704 bytes
SHA-256: d7890d7ce5c0d921b1a3d1041f76c500b2f7fc403cc722b39dabe46300952f6b
font_04_sfnt_off0001ad8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD8B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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