Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cc09f65f99d1fd…

MALICIOUS

PDF

117.7 KB Created: 2021-05-06 21:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecce9648de13c71a190651256e7c99df SHA-1: 117daab185d7fffb881e832158d304a4a16d20aa SHA-256: 39cc09f65f99d1fd95179d88d85b615ff10e3466c64a5b137033dc631c33e487
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 0.9998

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/strik?utm_term=delonghi+nespresso+vertuoplus+manual PDF link annotation
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/4649836.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/binary_trees_in_data_structure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_60615204ac417.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/65961708971.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/booster_pump_catalogue.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/icjf4ij/movies_2019_best_hollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/nzHhcgg/deathwish_red_sun_rising_traduzione.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/xetimifagidesovu.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/jhegdhe/zusakazusejuvugo.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/altivar_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_60579e44ce71f.pdfIn PDF document text
    • https://patilufadan.weebly.com/uploads/1/3/4/4/134462925/c724e.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/625159.pdfIn PDF document text
    • https://cdn.sqhk.co/kirovuwuvo/AxPTbgd/fojogakapozudubaj.pdfIn PDF document text
    • https://vikurevago.weebly.com/uploads/1/3/1/6/131606257/273469.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizuzol.onlinewebshop.net/how_to_build_a_magic_deck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f83e54-a41f-43b5-8220-a9e533d6af5f/which_is_colourless_in_h2o.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc25974-1a7a-49d9-9910-8ffa9159b54f/rizofijifowevasumuxobexa.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/74985742152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55deb49-15cb-47ff-bee0-2a0e2ffbe7b6/international_journal_of_innovative_research_in_medical_science_indexing.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/41383472813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8667d1aa-9fb8-4f05-8aa3-77977dca0967/votipuzapofuzakubusejapig.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_off00018b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B01 5292 bytes
SHA-256: 481d22bab762acb9219d080c45f0d4b8a337af81d9412b87c29bab1e0fe88626
font_01_sfnt_off00019ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CE1 15100 bytes
SHA-256: 75756ab6d63987e8d0899542c9c477252b34ffe0ddf62baccdbdcd73435f50c8

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