Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2b2bdac7daf0cf…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 13:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 22028857373fb7d0a7c79294174d7835 SHA-1: 13125caca50c05cdbdb31df27e420fabb78b3da6 SHA-256: 5d2b2bdac7daf0cff24a86ecd09a4c75e57162209599e45b28bc53d62a78e346
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=prentice+hall+united+states+history+modern+america+powerpoints In PDF document text
    • http://efarbok.xyz/sha256_checksum_windows_10zzwt4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379380/normal_5ffebd141c118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5feb0b2ee1033.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/ce385fa.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/832c9444072e446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6009e9668f3e5.pdfIn PDF document text
    • https://cdn.sqhk.co/jokutevek/9yiijaN/boo_the_world_s_cutest_dog_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_60144a60d637f.pdfIn PDF document text
    • http://idealicait.website/color_of_water2n6kj.pdfIn PDF document text
    • https://zapunetiregete.weebly.com/uploads/1/3/5/9/135956705/70e6c157fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_6026d54f66ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5fea3817b6636.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/zonebon/corporate_bylaws_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/3352066139.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_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 5508 bytes
SHA-256: 214762bb7fb28d9afdece3b49190573bcc8b729ceb1945a10ec00bd6f09805cd
font_01_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 10968 bytes
SHA-256: 704ed6c88bfef13683f9b1fdf71122466dff40a1f9f44d1f33916f15bf88aade

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