Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9356fb381fe132…

MALICIOUS

PDF

66.6 KB Created: 2020-11-23 19:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 8348d858582deac0b420c74f633eeeea SHA-1: 58ecaeb0527f888131741ea9ab06ed246c117a17 SHA-256: bf9356fb381fe1326a290b1d93d6280fc70f7580150e2e5fbd9cbd83b7497f5d
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://ggtraff.ru/aws?utm_term=jubel+klingande+tenor+saxophone+sheet+music In PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/8902627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fa784b874262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_5fb5bc63777ea.pdfIn PDF document text
    • https://nonuvatemex.weebly.com/uploads/1/3/4/4/134443968/rokija_dezazigusovu.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/zuxadol/88139722579.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/lirovuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pakex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f48a081-2ad2-4117-a85f-79c553964f2b/voluxivebikenimo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/12824086895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be800ebd-7d9b-4d5a-8989-f6a3bb5a3e0d/pajamesuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3458b6c-f818-49ed-a3c9-c7e132ffa174/toshiba_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/temperate_deserts_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3ca828-28b3-4474-8c79-573092810cc8/dimifapenipera.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/us_navy_chief_dress_blue_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/ccsa_ng_check_point_certified_security_administrator_study_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_off0000c321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC321 5748 bytes
SHA-256: d2a1fa2b96efefa26b5dda7d935bc84b370e6eb1274f71af79f1d2ec9ad1b596
font_01_sfnt_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 12104 bytes
SHA-256: 7c45298b55966291eb29ded64ffd5ee1f87b315d153bc553b81fdf4ed13c7643