Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e605f46e68ec152…

MALICIOUS

PDF

74.9 KB Created: 2021-02-19 05:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 001bb07b55d4c5525b61a0bcb667bc17 SHA-1: a71e98a8f98b8a5af6f584a586d5568dd8c5d1e2 SHA-256: 5e605f46e68ec152ae8e718e021929920ae6c8af650b85b5c677b2a6ad0899f4
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a book summary, directing users to a suspicious URL. The presence of embedded URLs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=adivina+quien+soy+megan+maxwell+resumen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386334/normal_600cb551eac59.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/hg4x3ih/sago_mini_babies_jack_the_rabbit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_6015d068d6d6e.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/d86049fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_601441fdbe2fa.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/h0yUjeu/jcpenney_portrait_studio_provo_utah.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/g4CH3hc/44000406021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406481/normal_6004417f9ac26.pdfIn PDF document text
    • https://vowemiwa.weebly.com/uploads/1/3/5/3/135392560/11152.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/Lxgd0rr/gfx_tool_for_asphalt_9_legends.pdfIn PDF document text
    • http://mevilesiroxivo.iblogger.org/using_berberine_and_metformin_together.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://bobumevemi.epizy.com/internship_report_student_declaration.pdfIn PDF document text
    • http://situbepid.epizy.com/xejijojo.pdfIn PDF document text
    • http://jusolasoxo.epizy.com/is_kali_linux_safe_for_beginners.pdfIn PDF document text
    • http://pijularof.epizy.com/glossary_of_computer_science_terms.pdfIn PDF document text
    • http://fuluputig.epizy.com/sitenunavazozibusovifo.pdfIn PDF document text
    • http://sosozodazu.epizy.com/avira_rescue_system_2019.pdfIn PDF document text
    • http://kogejikez.epizy.com/3268767479.pdfIn PDF document text
    • http://tuzikarowom.epizy.com/mokakafuvuxukebosev.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 5384 bytes
SHA-256: 65776360c19525eabfd32b3024e067a173ff6a5a208b75e8de669d2cc61bb151
font_01_sfnt_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 10216 bytes
SHA-256: be29f8d0463fb81f1260be82b82ef39e3c9d252d0dc6c0a1c80380cc5aadca8f
font_02_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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