Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde583a094861bb7…

MALICIOUS

PDF

66.6 KB Created: 2021-02-13 01:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d09999cd8d0350c7d1dd605e79f79647 SHA-1: 59596546584663fa631a60cbc4309081ad0b4c79 SHA-256: cde583a094861bb75a9cebe9c0b0320fe0498bb75fe8224b17c8b07e80f7619f
254 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
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=avenged+sevenfold+a+little+piece+of+heaven+lyrics In PDF document text
    • https://cdn.sqhk.co/fuvazuginu/gSYgjP5/wawuwijodofavanedirij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5fd74ef95e9ce.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/ggFjbHB/78751345828.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/bigidP4/history_of_marco_polo_hotel.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/hiaQXhc/46563569319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_5fd906f9a2a5a.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/tUidgcF/rolly_hill_jackpot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486354/normal_5fdae68b5f555.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/h1jcIpu/farming_master_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/cpibigl/disney_hotstar_login_limit.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/hihbjbf/meme_emoji_stickers_wastickerapps.pdfIn PDF document text
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/5047647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdb7e7a84478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_6016dea39e960.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/muvojugejoxip/kendo_chart_legend_labels_template.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_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 5568 bytes
SHA-256: d925f4d95972d74d0aab32f5b83d168534102302b68bf2effff3c0221e6e2bb8
font_01_sfnt_off0000db88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB88 9940 bytes
SHA-256: 37d0acabf41e0414a2aa92aeba38ebe957f53f76eef194acd7c9e4be90fc841e

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