Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f516324ed65528b…

MALICIOUS

PDF

68.2 KB Created: 2021-02-26 06:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 785607569ff6a2e7c16cd14621e181e6 SHA-1: 695a36de3e726eb6ffb04448a609b4d0283af617 SHA-256: 0f516324ed65528be777c4aa61243e96c10c75c51c14bed76d61d760d5dec958
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=yo+sin+tu+amor+letra+alto+voltaje PDF link annotation
    • https://cdn.sqhk.co/kusuteji/jhQqIi2/bebifuxubosuku.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/egegi2U/7565064721.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/AZiedjP/gafimatenitaxofija.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/axkniid/95524989006.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/aczgcix/fake_doctors_real_friends_call_in.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/5455580.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/alhKjjX/xarutid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5fd88331476d3.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/0JhjZM5/72577439587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_6007da1d7c234.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ligJ5jg/personal_management_skills_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rusuxipek.rf.gd/felunixu.pdfIn PDF document text
    • http://lurosanonit.epizy.com/why_is_my_netgear_router_not_working.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_off0000ccf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF8 4928 bytes
SHA-256: e4bf0fb84df69b93b69c43e278a7ed4e1fedca681695b7513a9bb875d9d2f0a4
font_01_sfnt_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 11232 bytes
SHA-256: 0abe698a2da8f266f1cbe6002a175a3446b00de08692582d3533dc831bd230b3