Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f6449be327b159…

MALICIOUS

PDF

75.2 KB Created: 2021-02-28 05:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f159f0d51cae02b81a26c36c946596a SHA-1: ebe3e9684a7a74971629d34d881a405bcd47327b SHA-256: 77f6449be327b15966815fd1f73e11cb459aeb4bb20b13174b3df598ddbbee24
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/wix?keyword=the+young+elites+pdf+free PDF link annotation
    • https://cdn.sqhk.co/fukonovum/iek5ic1/98941738907.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/5792844b5.pdfIn PDF document text
    • http://magic-world.site/cast_pc_screen_to_android_phone50m0l.pdfIn PDF document text
    • https://cdn.sqhk.co/lasukojizix/ieEJDkw/3126242142.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/pgiQTgi/ragatenixuwatumuxotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/aiiigkp/spanish_immersion_kindergarten_worksheets.pdfIn PDF document text
    • https://balebapu.weebly.com/uploads/1/3/5/3/135322653/rixaxobetepul-vipon-filin-silunowezo.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/YPjemhc/pugukixesoxaxoze.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/higevgu/31999426619.pdfIn PDF document text
    • http://aycotoro6.xyz/20650083120mx38.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/i8hiQje/fan_of_guns_hack_dinheiro_infinito_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/gigcGL6/96760373327.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/gjaljfL/ligoduru.pdfIn PDF document text
    • http://fionainthefield.org/abecedario_japones_hiragana_y_katakanagb6o0.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/Rgda6hf/7_wonders_duel_agora_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/1iaRfeN/microsoft_word_link_to_section_numbered_item.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/cghc73x/werewolf_online_beta_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/gh9YghX/28764709869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 5144 bytes
SHA-256: 9e241b56cf0819a6f5a4c2114208e3302000660c824d5ed4a29cbd722f0218da
font_01_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 10440 bytes
SHA-256: 9023d90f24d7a62cb33f5f7a575edfe3d3a26e22521efed99ac0dc448ce540d0

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