Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6a8138206e3f74…

MALICIOUS

PDF

69.3 KB Created: 2021-02-14 05:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4d20d5bbfb40ab91e4dfd7537e341f15 SHA-1: a825c8181d24aa9b31930dd880a5d8a359aeaa0b SHA-256: cd6a8138206e3f7411d32feba453d7a39bcb9245717bb80387a6d05037b1138a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=vestal+goodman+funeral+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_60217f11ace31.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/iPghjhw/gedilisu.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Riihju7/ant_smasher_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/38ahdll/bixigamalirak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447631/normal_6021ffac79d97.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/Hkuncjb/71280902463.pdfIn PDF document text
    • http://onatural.space/fodevifojijarufedzygs.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/cifU1QK/dream_score_soccer_champion_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5fd98d9736b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fd385ef430d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_602198fc719b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418557/normal_5ffd0d3414e19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zemipajobo.rf.gd/501_word_analogy.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_off0000d46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46A 5252 bytes
SHA-256: 55b800a65846aae249e98997378263c9e6bff8f40b0676de16d1f69d6f8b9593
font_01_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 10064 bytes
SHA-256: 21c72d447ec0eb37feb14fa9239ee170d57c3878a77ad9fea3c781b71ee7d2ad