Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b71c8aa7469362…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 06:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c2356860ca745ead379e19315ae3a08 SHA-1: ed91e94243523a1a65b3288c75dab596da203479 SHA-256: 68b71c8aa746936251191da5f0a476c906dd9d1038203f8e79bae3e8318f1608
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://jottigo.ru/strik?utm_term=beats+solo+3+wireless+special+edition+gold PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494889/normal_5fcef107ade67.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/perodijiwiledawaxerofobo.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/5196543721411wb6.pdfIn PDF document text
    • http://tameeniraq.com/hp_compaq_8000_elite_sff_specsx3qa9.pdfIn PDF document text
    • http://falufob.iblogger.org/historia_de_la_constitucion_mexicana_de_1917.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/tuzinigefuwifabibabolutu.pdfIn PDF document text
    • http://grantmedica.ru/ketetnvuu6.pdfIn PDF document text
    • http://copyright-rules-help.com/jungle_river_wallpaper_hd19qt2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_6009d2dbbbef1.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/how_to_turn_on_landice_treadmill.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404296/normal_5ff919516cb29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5fdf724fc8cd8.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/21307073493.pdfIn PDF document text
    • http://vashmaster.info/making_content_comprehensible_for_secondary_english_learners_the_siop_model_3rd_editionnxonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medexode.atwebpages.com/50057583379.pdfIn PDF document text
    • http://fegozovot.rf.gd/distance_and_displacement_worksheet_answers_key.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_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 5548 bytes
SHA-256: 77d7e69a126ac42c493f348189fdc60918510ae8749ec97d3ff8f8237df3c6b6
font_01_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 10704 bytes
SHA-256: 40abb3a71572c4f23043cea0ac47889c224d2c2bf09536792fa38028fa47c50d