Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8eeb863f7440269…

MALICIOUS

PDF

75.7 KB Created: 2021-01-31 22:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 411e902a857883b4f457d3e5151864a5 SHA-1: 3b09a19dd6aed824180a873e2208dc9a045d3c02 SHA-256: f8eeb863f74402692970a86c4bea73d7bfbe35d25bea3260afb9c6f6e66d3b40
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=call+of+duty+setup+file In PDF document text
    • https://cdn.sqhk.co/sufokorume/iehcRGb/flow_sports_1_tv_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/gfDBOvY/palapimizugak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_5ff1d112456a5.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/d1igfij/sefekatojonarirat.pdfIn PDF document text
    • http://gmetry.online/68851457018d3jpr.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/Kr4igrP/66842451689.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/fjconoy/pixel_car_soccer_apk.pdfIn PDF document text
    • http://armada.technology/cours_logistique_transports9q4r.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/fdiegin/hexaware_station_h.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/jc1qXgh/79169976176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_5ffc03282cce5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446645/normal_5feecaf3cd08e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xulivef.rf.gd/18764378004.pdfIn PDF document text
    • http://jikelofov.rf.gd/atul_purohit_garba_song_free.pdfIn PDF document text
    • http://faduzidivatakid.epizy.com/food_diary_template_word_doc.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_off0000ec65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 4948 bytes
SHA-256: 42aa5618b6e3dfa288a6956ebd9ce4c8f9e7222d46d4f0a61846345bf4bf5d27
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 10748 bytes
SHA-256: 995606af60973fe93140c99aceaba5e860f2e848d17e0e528992bae30a130a07