Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e781cd8d37428a…

MALICIOUS

PDF

89.5 KB Created: 2021-03-03 16:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ce5d2c2219372dff5ef42762895ccc6 SHA-1: 2d2db9bee1d8356c83a9461dbe01b6da9def9241 SHA-256: d6e781cd8d37428aaf4e8d6bfca6cbf08a44fd96bc4fd25b65281809a5460422
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 0.9998

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://baarspo.ru/strik?utm_term=singer+heavy+duty+sewing+machine+change+needle PDF link annotation
    • https://cdn.sqhk.co/diwewiduvaz/wEgiibs/nfl_fantasy_football_cheat_sheet_auction.pdfIn PDF document text
    • https://cdn.sqhk.co/riteximeras/jmtY08W/gedegipudazam.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/popapesezikufesani.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/ljgjhhc/91103758188.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/hhzid2l/64724155647.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/icj116v/xonotamizirosomevurinudod.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/ajajfif/youtube_vr_not_working_psvr.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/agjiFRo/81066280543.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/21487178936.pdfIn PDF document text
    • http://ferivufew.iblogger.org/gidakone.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/8686935766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • http://lifobem.myartsonline.com/left_behind_series_titles.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/cartoon_movie_free_mp4.pdfIn PDF document text
    • http://dexegesen.rf.gd/bepaze.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/50658002021.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/apache_tomcat_free_32_bit.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/pasta_boat_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/pozesafekuvomatadivoj.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_off000120ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EE 5712 bytes
SHA-256: 07e1ffe151984b9ceb63fd175f769481029b6cc2488982fd8dfe6b2b0d6041ab
font_01_sfnt_off00013453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13453 10476 bytes
SHA-256: 691e46bc9974e6ef0c4cd61406cfaaf00ca256d7218e25153ba3bc1025228292

Open this report in the interactive analyzer, or submit your own file for analysis.