Malicious PDF — malware analysis report

Static analysis result for SHA-256 24120eec12897bb9…

MALICIOUS

PDF

65.5 KB Created: 2021-02-18 16:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0818c19695dd8611ae0716f4cfe1efc6 SHA-1: c8db89d82c210cb0634e3ac69adb43de3c213046 SHA-256: 24120eec12897bb985b22aa8e87b5dcec8e1ba9e8337e84e1d3e311da37f243e
196 Risk Score

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 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.
  • 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://maypoin.ru/aws?utm_term=sql+fundamentals+1+pdf PDF link annotation
    • https://cdn.sqhk.co/lilapanorup/ieK0Q5U/982701678.pdfIn PDF document text
    • https://gamabisage.weebly.com/uploads/1/3/2/6/132681080/minovapaji_vumogozere_xivovasigojagif_gibenaliv.pdfIn PDF document text
    • https://cdn.sqhk.co/vapelomusanu/gihi2jb/27643928230.pdfIn PDF document text
    • https://tujewadis.weebly.com/uploads/1/3/5/3/135312055/882579c0.pdfIn PDF document text
    • http://difavusimope.iblogger.org/bakiziru.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/2286950.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/fhige81/28823357059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/avocent_6016_console_server_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/71003326854.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/mejobefomefaruxanoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/84293254331.pdfIn PDF document text
    • http://kabofed.rf.gd/85156818498.pdfIn PDF document text
    • http://luxopemuvoxu.rf.gd/tiferazoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/47838288707.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/41057231798.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_off0000c13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13F 5372 bytes
SHA-256: 50f2eefe8091394ce9e4f4257def1278936cd7e9b62df8511442ad5b67920fa1
font_01_sfnt_off0000d380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD380 11072 bytes
SHA-256: 9d6bb49dbb5835486607930dce679c67c86bb519ccaf77f27b7d30be2987ecad