Malicious PDF — malware analysis report

Static analysis result for SHA-256 080ded89fc9fa351…

MALICIOUS

PDF

76.2 KB Created: 2021-02-20 22:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9a51ba7b17e92368f91ec58babb11b9c SHA-1: e89188784ebf272766169b4f0a93c0fe128af248 SHA-256: 080ded89fc9fa351f7703b4e85582c1ed7d980ddef9c98da0074c7c1ce45ec48
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%20host%20a%20sprinkle%20baby%20shower In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_5fe7ef74dd652.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5ffcd7ab1c83c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fd67dd60ee83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456389/normal_5ffff48b791a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5ffdef9019868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_601278bcda519.pdfIn PDF document text
    • https://dofudovi.weebly.com/uploads/1/3/6/0/136092117/begixepewul.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/wegemebufojafak/how_to_have_a_flat_tummy_after_c_section.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/meditation_music_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/buxevajapujugudexuzusej.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/gegawukuzedekukopej.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/wekilufusotipuzuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/rivifabirexovux.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/accuracy_and_precision_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/collecting_weather_data_worksheet.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_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 5268 bytes
SHA-256: a1cc00a9b7c3d3f402fa3a963465793c4e2c6e0ca0463634a68c827d5836e98c
font_01_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10688 bytes
SHA-256: ccb285c48a7d7dbef8e95fb7d3cb40a08981c847bba6852379570568b499576c