Malicious PDF — malware analysis report

Static analysis result for SHA-256 968d1cdfdf5a3d15…

MALICIOUS

PDF

73.9 KB Created: 2021-03-13 13:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 689a2ecf1e1e4f96e42b532c73993a75 SHA-1: ee7119c0827c8f0e27398d0057f9f7a93ef0ae91 SHA-256: 968d1cdfdf5a3d154723b9688aea22162061da7428b799de30ff6e5c00696a64
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URLs, suggesting it's designed to redirect users to download malicious content, likely disguised as a study guide. The presence of multiple disposable domains and link farms further supports a malicious intent to obscure the true source of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=togaf+9.2+study+guide+pdf PDF link annotation
    • http://hermidkovo.info/how_to_use_the_tub_clean_cycle_on_an_lg_washert6oan.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/hbxEZur/xekirubutipuzomifikotuxaj.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/daloz.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/29877716313.pdfIn PDF document text
    • http://stroiline74.ru/voodoo_spells_reviewsfs8ng.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/3d8760b74f9f77.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/toxisodujopisikemofev.pdfIn PDF document text
    • http://funuretebinuzos.iblogger.org/step_aerobic_music_free.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/rejet-jujezuxerovepuv-rapato-dedujolates.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/3029559.pdfIn PDF document text
    • http://clipshd.design/diablo_1_belzebub_necromancer_guideyw8eh.pdfIn PDF document text
    • http://rrrrkkkkk.space/vimegefitadurinitigagaknen0r.pdfIn PDF document text
    • http://energytik.net/history_of_memory_studiesmns79.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/heYegg4/ben_10_alien_experience_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiwifuwuvema.epizy.com/remugowovomonojo.pdfIn PDF document text
    • http://ruwukag.epizy.com/rogamigemuwivef.pdfIn PDF document text
    • http://jizirolizeguwok.rf.gd/e46_m3_transmission_fluid_leak.pdfIn PDF document text
    • http://wafubarig.epizy.com/la_ciudad_de_las_bestias_capitulo_4_resumen.pdfIn PDF document text
    • http://ketaxesam.epizy.com/storia_della_cicala_e_formica.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_off0000e246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 5452 bytes
SHA-256: 6abccef1547a7798569b180ec29dbe1dfff270d30a138e2ef7a4089b8933ca51
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11276 bytes
SHA-256: 47ddc6596f3320c68849c1e5f3bab70a50edbb8236f30a5a5c03a26df7795e44

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