Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c6bf9a1a994b54…

MALICIOUS

PDF

71.6 KB Created: 2021-02-18 05:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ff3ae36a57c99dd374ab1bee32c3d3d8 SHA-1: b7029a5f0f043b5db7a71ff7d64a145e9af2516f SHA-256: 34c6bf9a1a994b546a8cac8bc307e05f2ea4cfc297719b25000be7622e9d9f17
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=summon+lesser+demons+dnd+beyond In PDF document text
    • http://guditoresuz.22web.org/tata_sky_remote_control_apk.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/8116021.pdfIn PDF document text
    • http://ideal-it.fun/duwatuc5gkm.pdfIn PDF document text
    • https://kozamewibigox.weebly.com/uploads/1/3/0/8/130874388/1457f.pdfIn PDF document text
    • http://egosikenclub.com/25941004248pav40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fcc930c5ad95.pdfIn PDF document text
    • http://gayerkan.com/career_path_template_for_employeruimru.pdfIn PDF document text
    • http://salet.store/action_verb_activitiesf96pm.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/daselex/vepar.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/assiduidade_e_pontualidade.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/wawopo.pdfIn PDF document text
    • http://wexiwifobezaxi.epizy.com/84863159145.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/67192125858.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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5104 bytes
SHA-256: 15158224a45e0a19308175a8bfa4511b01bae82f3f6d9d2db4b084467146e2b6
font_01_sfnt_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 10380 bytes
SHA-256: 89db41b6451650be59a5edb7af2cc8f92e599acefaa7591a2f67b5705d687240