Malicious PDF — malware analysis report

Static analysis result for SHA-256 195e1ef0f6be6f53…

MALICIOUS

PDF

79.7 KB Created: 2021-05-11 16:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 15743cb1a2c8200b9c79a46452d70c57 SHA-1: 56831cf61f7eaa043767b7a0cf5f529e559e86ac SHA-256: 195e1ef0f6be6f53e817da6a34504c4d6515ddcb0feaa78df17b3fa3ec7e6b1f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=how+to+write+yes+sir+in+a+sentence PDF link annotation
    • https://cdn.sqhk.co/xuxiropuwomo/igFwUhJ/arkham_knight_quickfire_line_launcher_xbox.pdfIn PDF document text
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/12323.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/baricco_mr_gwyn.pdfIn PDF document text
    • http://sozawakofuriwoj.getenjoyment.net/pejufegoda.pdfIn PDF document text
    • http://idealsit.fun/what_do_you_put_for_hobbies_on_a_resumex98b5.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/tazafadewaxizeso.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/grupo_empresarial_angeles_bolsa_mexicana_de_valores.pdfIn PDF document text
    • https://tesevazaxuj.weebly.com/uploads/1/3/4/4/134476418/fddaee6522080.pdfIn PDF document text
    • http://becloud.website/evenflo_chase_lx_booster_car_seat_-_jamesonmra4z.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/irrational_thoughts_cbt.pdfIn PDF document text
    • http://dajexori.mypressonline.com/irregular_reflexive_verbs_spanish_preterite.pdfIn PDF document text
    • http://funiwigurogamu.iblogger.org/55434571946.pdfIn PDF document text
    • https://xevekarisugi.weebly.com/uploads/1/3/4/6/134697334/fupuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/P9ehbon/wexawunutujuzilubi.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/nasaviguxafenura.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/vojotizo.pdfIn PDF document text
    • http://trychambre.xyz/98635590166n7vke.pdfIn PDF document text
    • http://itnegozio.info/wunusevucwzg4.pdfIn PDF document text
    • http://nulonelam.66ghz.com/seven-_eleven_japan_co._ltd_annual_report.pdfIn PDF document text
    • http://peuer.xyz/wheres_disneyland_in_floridacro65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosurok.myartsonline.com/kixinorakezazinomukob.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/telecharger_journal_echourouk_algerie.pdfIn PDF document text
    • http://fasajixibapa.epizy.com/36530363915.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/antimicrobial_agents.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_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 4916 bytes
SHA-256: 16fb1a853c0438b0c9ddf6152fef2fcb985418319de7ffd8335a797db3cc5749
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 10948 bytes
SHA-256: 14471a211c3d045c0cc10b9169ef32884ce00e2246d0e889c424333cbca3d0a0

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