Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee4c55d0a9f743a…

MALICIOUS

PDF

75.9 KB Created: 2021-02-17 01:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d01949166355590b32c9000be01815cc SHA-1: 5ccbda0da475be2cb27a51fcdbe0f892bf4fb2a0 SHA-256: bee4c55d0a9f743a5efe8cd8b3aa2694ca4f71661f0c0a2912041ab195b727a6
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/wb?keyword=how%20to%20open%20hp%20probook%20450%20g4 In PDF document text
    • http://joy-todays.online/bein_sports_tr_izle_canlu3z3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_602c09b8edd29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495839/normal_600d90eeac1e6.pdfIn PDF document text
    • http://mantenancie.com/tugokevepaxifidumewetg835q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fe6160dc782c.pdfIn PDF document text
    • http://copyright-rules-help.com/metformin_xr_maximum_dosewmel4.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/a829d526050.pdfIn PDF document text
    • http://alkostore.xyz/formal_email_complaint_templateihp27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_5fe61372840e4.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/wesezuzuvalirik/counter_strike_1._6_free_bots.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/lirik_lagu_sebuah_rasa_agnes_monica.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/caterham_weather_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/guardian_travel_guide_marseille.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/zenafid.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/phenytoin_davis_drug_guide.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_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5272 bytes
SHA-256: 2d65e70048a5a59bad48eb9c52eb2a1a0e52dd9d9828ce8fb1218c6a1bcacfc0
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 11240 bytes
SHA-256: 9c726ae2d42eeb66504cb6b41ae5ce0a6a8ac50e3120fa93bf2cb23de6a1b883