Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6345c036e7c4575…

MALICIOUS

PDF

78.3 KB Created: 2021-06-14 21:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bcd899df4c4dba65a9d4614a18315707 SHA-1: 2da3c9359d52e5f93156a56b7b866fa669544e81 SHA-256: c6345c036e7c45758f45bb1eb88b35a73c5c207f34867546649020b341f01633
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 0.9996

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://philabc.ru/pbw?utm_term=dog+house+stardew+valley PDF link annotation
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/nelazekiko.pdfIn PDF document text
    • https://jozudepixivi.weebly.com/uploads/1/3/4/6/134682498/3976a02e5a.pdfIn PDF document text
    • https://naworetomepixi.weebly.com/uploads/1/3/7/5/137504938/gawizofaj.pdfIn PDF document text
    • https://lerugusenexeke.weebly.com/uploads/1/3/5/3/135317851/tobof_gulovaretol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dibotoge.pbworks.com/w/file/fetch/144881640/dozijomonagalozakuwesiz.pdfIn PDF document text
    • http://fomefegaf.pbworks.com/w/file/fetch/144932385/xezomibiwezutemofuzago.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144759213/what_is_systematic_approach_to_training.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144494316/66597988460.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/144443529/industrial_revolution_bbc_documentary_worksheet_answers.pdfIn PDF document text
    • http://zotugon.pbworks.com/f/70571142827.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144819771/lenomopedowape.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144449796/how_to_stop_auto_clicker_on_mac.pdfIn PDF document text
    • http://ladopupog.pbworks.com/f/limits_formula_jee.pdfIn PDF document text
    • http://defuveb.pbworks.com/f/lepifebukilisepabawariv.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/hamilton_beach_toaster_oven_rotisserie_chicken.pdfIn PDF document text
    • http://zovunimonara.pbworks.com/f/coordinate_plane_generator.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144523518/data_retention_policy_template_iso_27001.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/ford_fiesta_owners_manual_2017.pdfIn PDF document text
    • http://lowigamivux.pbworks.com/w/file/fetch/144732279/fifataviwarigug.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144414783/real_book_bass_clef_free.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/pageant_script_sample.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/w/file/fetch/145036053/gipuripamenasizugil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5068 bytes
SHA-256: 3a45434dea2ec0d5bc0ed956e4f63c76ff603f7bcd17806ce0d99368633d9872
font_01_sfnt_off0000f8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 10772 bytes
SHA-256: 4ab01cc21ba1be211043871af8f85e30dab7c585b044b005a97778ccd566821f
font_02_sfnt_off00011dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2