Malicious PDF — malware analysis report

Static analysis result for SHA-256 d367d5f7c64bee93…

MALICIOUS

PDF

84.6 KB Created: 2021-05-17 02:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e12e126ae5f6dfda9e3c890c0b0af0c7 SHA-1: 2167f4860ce444a0970a8f85fa8ec7d74319b5bc SHA-256: d367d5f7c64bee93235c1faa7a5cb882852696c240dfd946acc7e9084b69bc9a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=how+to+reset+epson+l110+printer+ink+pad PDF link annotation
    • http://dosaxixapaxa.medianewsonline.com/85775553491.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/safin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff31aeef0843.pdfIn PDF document text
    • http://spencermcman.us/the_reluctant_fundamentalist_summary_chapter_9y9ofi.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/bureau_of_immigration_departure_card.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/6433676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_604ec4476e48f.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/419403472665u4tn.pdfIn PDF document text
    • https://kamujepepafiga.weebly.com/uploads/1/3/0/7/130775209/04473776512.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/bbc_compacta_class_11_english_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_601a86487bec7.pdfIn PDF document text
    • http://santand-es.com/wasafy0rmt.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/arthashastra_in_tamil_free_download.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/fowululigowisit_pimizokori_xetupekotekotol.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/eEijjdj/dexanufejo.pdfIn PDF document text
    • https://dasubafetimediz.weebly.com/uploads/1/3/4/6/134673415/1567529.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/idVFif9/sims_4_cheats_build_mode_apartments.pdfIn PDF document text
    • https://folumenudi.weebly.com/uploads/1/3/2/6/132681426/bifajav.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/5421735.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/concepto_de_administracion_publica_segun_autores.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/nokiposamufuf.pdfIn PDF document text
    • http://voirlo.xyz/ferunilinogalivadozei6w9f.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/gUsAHhd/landscape_in_the_mist_music_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 5264 bytes
SHA-256: c16b53df845b79cf405cf04ffa4df6582f1b56ea9a1019affcd5da148436b70d
font_01_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 11484 bytes
SHA-256: b14e4a034ecf6a2d82ad5b0cc6b8cfa0abb2d5f600bf34473c2d674d8227d2c2