Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f8bc758d31dcf2…

MALICIOUS

PDF

38.4 KB Created: 2020-11-09 14:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2c65625978bd8395331ac79e9278a301 SHA-1: 442ec8a11424c8e8b2fa0577291ec11108662808 SHA-256: e0f8bc758d31dcf28afce8a9c060c68a0e16bd37648985b6e4cd242ccc70f84c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafftec.ru/strik?keyword=lyrics+to+good+good+father+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5fa5aaececf5c.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/5719065.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/845838.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/soladarasewud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5f958f6918246.pdfIn PDF document text
    • https://torawatuxopo.weebly.com/uploads/1/3/4/3/134379163/tuvagibiwarezok_kilaparixak_lunamuzow_gafogumiwejaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f90a9bbe01a4.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/takateg/short_pump_elementary_school_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/jewaterexagijep.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/the_defining_decade_meg_jay.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/losifisexidixedupi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/go_math_6th_grade_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/outer_worlds_scylla_walkthrough.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_off000058ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 5428 bytes
SHA-256: afdb7b3669c1c3bfa2ffb65d96132c2feb81194fe18bb46be3ad24ada4ce8883
font_01_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 10140 bytes
SHA-256: 448bc27504dce5f847c04ce75d13ab8ff770fcb3b06d89fb8beaa86eb34a7dd9