Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c7acd462bfa9bf…

MALICIOUS

PDF

87.5 KB Created: 2021-03-31 22:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fead111876b83f545df1c87de113c1a0 SHA-1: 9b725767979918554a0dc3bb2514114116709b54 SHA-256: 79c7acd462bfa9bf748245ac7c49b1f66276b45f7a75013abab2ee68321705c7
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=amharic+bible+study+pdf+free+download PDF link annotation
    • http://gufutaca3.xyz/nefusevariwoberuwc62dd.pdfIn PDF document text
    • http://italystore.pro/lowest_common_multiple_worksheetaq9l5.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/zoned_joluzavelije_meroxep_magep.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/YSPOtjj/island_survival_minecraft_seeds_1._16.pdfIn PDF document text
    • http://procripton.com/canon_powershot_sx700_hs_manual0bq5y.pdfIn PDF document text
    • http://sarhello.online/mivanewa35e1.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/jihjegh/godifuputiwafexosadu.pdfIn PDF document text
    • http://kieverts.xyz/rivasav0ue4.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/modimejipalewuw.pdfIn PDF document text
    • http://zuberisuxivaki.scienceontheweb.net/livre_pour_apprendre_l_anglais_gratuit.pdfIn PDF document text
    • https://suwutijotelites.weebly.com/uploads/1/3/6/0/136083726/7149521.pdfIn PDF document text
    • http://cashthe.ru/24514569694193lv.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/52401864344.pdfIn PDF document text
    • http://honey-love.ru/95349206556nk1tn.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/sample_employment_application_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxegujanamefas.atwebpages.com/disacaridos_clasificacion.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/larab.pdfIn PDF document text
    • http://polilofu.onlinewebshop.net/cinderella_solution_diet.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/mojidotukegoliruvas.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 12884 bytes
SHA-256: cc682a7f5be796ee83855ce62daeb924bcc0af9efca8d0b202d784b12f6e32e2
font_01_sfnt_off00010245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 5716 bytes
SHA-256: 51fd106781905e5d7862bd257a888f7e0d163ae2327940415e8e1d2c9c7eb53f
font_02_sfnt_off000115a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A7 10796 bytes
SHA-256: 72059ab2c151f305619019b79ffe90613290c82497bf573fe7d80972080c37e2
font_03_sfnt_off00013a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9F 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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