Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06d8dd1c027221b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-23 17:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8833c99922bc41ffb125bbd44e07af9a SHA-1: 915f1166ae8b827069890ffc173826ca003225fc SHA-256: c06d8dd1c027221b0cf50ad54749ad42ba61a7d1232b757287969a447eb392bb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external links and a deceptive download button, indicating an attempt to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external links and lures points towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://nipisod.ru/123?utm_term=sort+worksheets+in+excel+alphabetically PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5fedb4682f397.pdfIn PDF document text
    • http://br1.red/85756020977pyd3a.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/nesisenirijoxi.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/anticoagulant_drug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_6058633e5fbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_6052362194185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5ff90e240802c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/gWhd3Bt/diversity_synonym_words.pdfIn PDF document text
    • http://devlp.design/alcatel_one_touch_fierce_2_keeps_restarting2r5p1.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/can_a_lutheran_pastor_perform_a_wedding_ceremony_outside_of_a_church.pdfIn PDF document text
    • http://theandyhong.com/balearia_palma_formenteraz4ni2.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/maths_formulas_for_psc_exams.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/kosazodafuvinijogida.pdfIn PDF document text
    • http://copriyghtconfirmed.com/drive_hd_cobra_reviewbvmbh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_6007df1eec305.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/5NNmzN9/big_shark_osrs_ge.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/hc3PggD/the_wolf_hunterz_band_wiki.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/nolodefi.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/talowojivimimagokudaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_6056b08f3b60e.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/iaCifia/3051207066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwemanuwixam.atwebpages.com/ice_fishing_techniques_for_rainbow_trout.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/75688700724.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_off0000ed81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 5592 bytes
SHA-256: f9ff2c6074678363604f38fc5d8672db7ec5bfe504f986967c0df2c200c18046
font_01_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 11592 bytes
SHA-256: bc0000381b4b33c631481df6d2116b75052cd8a36ff58a37c9e5b971642dcf2e

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