Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e3530dae7fac08…

MALICIOUS

PDF

197.1 KB Created: 2021-02-22 06:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7d3be0568cc8cdf7e85315d52d7f8120 SHA-1: 08464407343b400b36f84aa1b26d4fb8f8166769 SHA-256: 63e3530dae7fac085854cae4a02b411d3002e9b2b6a9fb8793e6090059c94b6d
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure referencing 'Bojack Horseman screenwriter' and includes a high-confidence heuristic for SEO redirector links, pointing to 'https://jottigo.ru/strik?utm_term=bojack+horseman+screenwriter'. This URL is likely used for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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
  • 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.
  • 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/strik?utm_term=bojack+horseman+screenwriter PDF link annotation
    • https://cdn.sqhk.co/gizivapejoko/igjjgeq/las_vegas_casinos_bingo_halls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383464/normal_60037a9b8a7e5.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/jnkUyie/sms_messages_on_mac_not_sending.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/pWvjhii/56269242511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60199e0052bdf.pdfIn PDF document text
    • http://numberoone.xyz/3540742267ejda2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_602fd7305793c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386365/normal_5fc69111d853d.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/irQhhGL/duziti.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowatu/aGcNe1X/plants_vs_zombie_2_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/hf2RGja/jebewixanofavimadu.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/4icsgi4/52292441544.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/igMiche/running_fred_unblocked_games_vevo.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/VNOCJih/vonepetiguzopenolelafibu.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/6ELQgdX/delobodulopugojusopibumor.pdfIn PDF document text
    • https://cdn.sqhk.co/godivago/ghq8zji/sukomexekuwosuzerelazef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_6030dd95a5036.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/dv0yjeC/rimijonebobowedosogabe.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jahj9fS/mewegegizitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_602ba1cc87976.pdfIn PDF document text
    • http://www.opentle.orgIn 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://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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00029f48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29F48 17556 bytes
SHA-256: 66ca8ba8a85ae00fea5d9efd580c406077ad9b409416658a409a67a6d51121d2
font_00_sfnt_off00028e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E2A 5076 bytes
SHA-256: 3171c302ec20c497b34b0d1b1e8cae69c74e47a9b800a9d44db7ef088ba924a9
font_02_sfnt_off0002ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE8B 12300 bytes
SHA-256: 172375467f23c287a90610de8760503c30abbea71c22b42e0734c378f282c517
font_03_sfnt_off0002f762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F762 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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