Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0979170a030ad03…

MALICIOUS

PDF

75.3 KB Created: 2021-03-07 20:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 55409bb8b111851d5dbc5dd288bfab2e SHA-1: 85c27ed498619feaab619716b230916d72eeb3d3 SHA-256: c0979170a030ad0398bf4a0f1e49d8d86ade7d07efc819727f68598ce39ccf53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that point to disposable domains, characteristic of a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=the+passage+not+renewed PDF link annotation
    • http://santand-es.com/56598212002915zu.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/raropuguxevutozet.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/10_day_green_smoothie_cleanse_recipes_day_1.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/words_to_describe_poetry.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/taxujawux.pdfIn PDF document text
    • http://xtreme-sport.ru/dasuwajupzc67z.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/ralotuwujalibunemosi.pdfIn PDF document text
    • http://wuvudazesog.22web.org/programmable_logic_controllers_frank_petruzella_solution_manual_5th_edition.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/black_and_decker_jigsaw.pdfIn PDF document text
    • http://frukt.fun/damewotaforosuvirikotimw71q.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/jobajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/42461914044.pdfIn PDF document text
    • http://pagujuropiwadiv.rf.gd/background_photo_editor_free_for_pc.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/como_actualizar_gps_garmin_nuvi_1200_gratis.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/xopiw.pdfIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_9c9b5e5e9c034c1ea841f790de767918.pdf?index=trueIn PDF document text
    • http://dipapomumekafog.epizy.com/jorumesenujogakagadat.pdfIn PDF document text
    • http://dorerewilaf.epizy.com/menopidoz.pdfIn PDF document text
    • http://romakilax.myartsonline.com/94028919846.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/reportage_legion_etrangere_2019.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_eb82df9c47654b26b7d741060ad0dc1f.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_0b66ef945f674503a4efe4a44b7a0569.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_b91df992bf484cc7a6f0866181109d5d.pdf?index=trueIn 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_off0000e82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5232 bytes
SHA-256: 6537cbe76cd02247e4126458834095589f46e4bc949d302f24fd587f52d472cb
font_01_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 11028 bytes
SHA-256: b0781462a48394463d7fa1cf577ef27803a6c39c818dee1f12e1b9c35f49ab42

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