Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31e078e9f2c7a1d…

MALICIOUS

PDF

76.9 KB Created: 2020-12-17 15:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f56a635d60e2c133371af7ceed1f8b4 SHA-1: c0ed52e4e72689a592eda0cd8add8cd79a77dce5 SHA-256: f31e078e9f2c7a1dc7f636a33b4c033fe41803a6913bba39d0200a33867e55e5
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://gettraff.ru/aws?utm_term=awake+2007+full+movie++480p In PDF document text
    • https://tedojumutu.weebly.com/uploads/1/3/4/0/134042579/xavobufowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473322/normal_5fa9d35b9d5dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_5fa635d96abf6.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/wamuwoteta_pamujojirelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc21c713c6ccf69f3a6045c/1606556791435/846155233.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ebffabffab30daa8de6c/t/5fd053005ec17a4c668e3971/1607488257739/metal_slug_3_mod_apk_unlimited_credit.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/belvedere_junior_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/pork_belly_air_fryer_keto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc134d361e25426e163d416/1606497491359/wuwupoparopafavonuweko.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/chemical_safety_quiz_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc23cc43485235c8610fa2f/1606565061378/zuminexuvor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c9569d-3aac-475d-9188-c30f6b53f98a/vunawejara.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf0af79c08c7f2b9da020/1606217903260/blue_planet_project_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/indian_advocate_logo_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/powerdirector_crack_apk_for_pc.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_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 5612 bytes
SHA-256: 23d595c44be492cc6d5114e029187f98ef2ce479b910ec21694b358c87fd9057
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 11200 bytes
SHA-256: 524d3b5b8d845838b148c7d2c82b8a56d6643acbb684f6dbe9946427de2df269

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