Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fea68809cf7c32…

MALICIOUS

PDF

67.4 KB Created: 2021-02-26 03:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b47d3cd114f6fa0fa431006c6f304620 SHA-1: cc331ba54c4686e3299cf805bf261c5243904f5a SHA-256: 79fea68809cf7c32b1708b154d0e68f2fa974b82c844da2a6e1b6ee531c0c76c
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://jacksth.ru/award?keyword=avital+5303l+security%252Fremote+start+system PDF link annotation
    • https://soxagunolipug.weebly.com/uploads/1/3/4/8/134887217/fibupopoluf.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/O3jFCig/zamokugexidelezesiwibiwoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/iff0ij8/asphalt_xtreme_rally_racing_mod_apk_data.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/civjjfT/tuvamakifuxamapof.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/gdijjdv/homemade_chocolate_ice_cream_recipe_for_machine.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/ddeddd987ed.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/g6ihjjs/73362586700.pdfIn PDF document text
    • http://fly-drive.online/jiffy_lube_livehq56a.pdfIn PDF document text
    • http://filmera.ru/cidades_inventadas_ferreira_gullarl4nue.pdfIn PDF document text
    • http://gituwema.iblogger.org/relatuzopaxugok.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/Dbgijd7/gakuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/cLUljbI/doctor_on_demand_coupon_free_visit.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/fhHghhg/razer_kiyo_review.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/ghheVaZ/line_graph_meaning_science.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexatati.epizy.com/72003836528.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_off0000cb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB26 5564 bytes
SHA-256: aaa22024f4169d5f8111222c7a7b7e80f1a9485a4577d7d8613037fa9decedaa
font_01_sfnt_off0000de12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 10204 bytes
SHA-256: 428cce57beb0d0cafb5f64a07bab412fe553dba7f14a54e26593e46a6c1f1fae