Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4869e916a43b18…

MALICIOUS

PDF

74.8 KB Created: 2021-05-12 16:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 16f71acf333efd45d65226617e5dfd87 SHA-1: 70a087c37535fb7257892b9ea198826a6eb387c7 SHA-256: ae4869e916a43b186e6945b4833182aac09cb72eb1d5f6aad79b56bd40e740f9
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 0.9991

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://bologen.ru/strik?utm_term=best+conversation+between+two+friends PDF link annotation
    • https://cdn.sqhk.co/vonitumefide/LNia5Q9/child_care_license_lookup_colorado.pdfIn PDF document text
    • http://lesifipi.22web.org/ace_academy_rrb_je_test_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465545/normal_604d9cf54f643.pdfIn PDF document text
    • http://taxutipepavij.iblogger.org/criminal_justice_system_reform.pdfIn PDF document text
    • https://zobagitolofoxaz.weebly.com/uploads/1/3/0/7/130739917/mefamuvaxavanodixax.pdfIn PDF document text
    • https://sajoviginuxux.weebly.com/uploads/1/3/2/7/132712139/gokiluvilulivi-dajikamibijej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fe780d0b6497.pdfIn PDF document text
    • http://malurafokopumer.22web.org/30314627705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_604985e8acc50.pdfIn PDF document text
    • http://fevofawemuwa.medianewsonline.com/65923599801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_60049a0d87cdb.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/what_are_the_writing_methods.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/cTQifVj/pubg_gun_shooting_sound_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_600af233c3db3.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/mofam.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/hajbja8/kojaxexovojokegetevek.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/iBhawTi/29361795628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/109b0a5c-020b-48cc-aae1-915e800a05b2/posurefeludazevejo.pdfIn PDF document text
    • http://pudosuvosav.atwebpages.com/31158042015.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/webowu.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/36791011643.pdfIn PDF document text
    • http://lawekapijef.epizy.com/what_is_the_weight_limit_for_a_15_ft_trampoline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885f8d46-3144-463a-b5b4-ea65aa7bcfca/what_kind_of_math_is_used_in_aerospace_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4d3bdf-3966-4007-8463-671c1108902a/just_two_words_1149.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_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 5324 bytes
SHA-256: b01b7453e02b8afc0ba49e3904bee53628009d01889cb98e04ffc588df8ae9d5
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 11044 bytes
SHA-256: 7846a38c4951b7168b35ca4041364dec10fa80908df8d425e3446673c189083a