Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f05f791fe993ffe…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 20:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 26b71cd53b0adda7f61377584fea0404 SHA-1: 27483ed1454520be4fbf04a7caa221d27e5f4898 SHA-256: 1f05f791fe993ffebad85f5732f24cac350dfca1d2f6d07215c0a61e64df095b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/award?keyword=bostitch+sb-1850bn+rubber+tip In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fedae4ed4cf3.pdfIn PDF document text
    • http://golixudib.mypressonline.com/the_rime_of_the_ancient_mariner_very_short_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5ff06b8f6ef57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5ff6a366a287c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477921/normal_6007bbb624461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_601d3d9831657.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/AFjaWkt/15921591988.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/jinabom/athena_and_arachne.pdfIn PDF document text
    • http://mirokuf.rf.gd/brute_force_attack_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/fujebonoli.pdfIn PDF document text
    • http://maxafatuvapare.rf.gd/smokey_and_the_bandit_2_soundtrack.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_to_change_time_on_samsung_idcs_18d.pdfIn PDF document text
    • http://zevovalik.epizy.com/kajomokodumubiluza.pdfIn PDF document text
    • http://mipolerabafobe.epizy.com/what_is_the_neo_personality_inventory_test.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_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 5512 bytes
SHA-256: 6bfb7eba291f034550806889ef9706fc2cc273406787d4c13772d1276d6c6aa8
font_01_sfnt_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 10120 bytes
SHA-256: c5915a2919b182ca7c9727647fc3c0b3be7ce949c615e3338b9c2577bf90d907