Malicious PDF — malware analysis report

Static analysis result for SHA-256 5673ce306830eb98…

MALICIOUS

PDF

94.4 KB Created: 2021-03-14 16:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11194432e7a06b17ec1d045a2de76def SHA-1: 9b0907a70164022464490bb00775ab7c06c522db SHA-256: 5673ce306830eb9824cce0a2397dc8601ca4199e21198273cc1e584e46ed902f
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 0.9967

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://soxebez.ru/strik?utm_term=where+is+the+transmission+control+module+located+on+a+2006+jeep+commander PDF link annotation
    • https://cdn.sqhk.co/balaragu/64ig7gj/smash_bros_characters_unlock.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/30299528071.pdfIn PDF document text
    • https://pugoxadegile.weebly.com/uploads/1/3/1/3/131379866/gegugoj.pdfIn PDF document text
    • https://tefakunuti.weebly.com/uploads/1/3/1/8/131871494/2321903.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/a_level_biology_question_papers.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/canon_pixma_mx922_ink_walmart.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/autocad_assembly_drawing_tutorial.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/loxelapijolumotunapimu.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/kobalt_12_dual_bevel_miter_saw_manual.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/kozesabuz.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/6c4d570c035ee4.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/hp_pavilion_dv6000_technical_specifications.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/sfgdCig/lagoli.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/verizon_jetpack_mifi_6620l_download_speed.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/gixomemitobidavurowope.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/garanopasez.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/radio_shack_mpa-250_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/aYggegi/penegumag.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/7720081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/apollo_pit_bike_125cc_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c17bdd-a02d-42c4-a75a-69575165c1a5/rigutojitudakav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a14cf06-ced9-42d8-8e9c-4028612d4aca/do_pure_substances_have_exact_melting_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b754ff3b-577c-4725-8abb-51e80bcceadd/are_mitre_boxes_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4864b3-3f7d-4aa7-a4b3-e33b9b0cf6e0/chicago_electric_reciprocating_saw_4.5_amp.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/44267573489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b5742d-27ef-4036-a8cc-dba01275fcbc/the_power_of_no_book_review.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_off000131b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B9 5828 bytes
SHA-256: a91eed048165e40d0ec539c9def8a8fb1822c21c1a0fded20ca0f21646f6a64f
font_01_sfnt_off00014579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14579 11036 bytes
SHA-256: 865a2f577a1788dec0f47d1a0bc01e7eadba8feffce97ed7b370bfda0431fd0f