Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0fb6c0908de6ee…

MALICIOUS

PDF

80.9 KB Created: 2021-02-23 01:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f11cfb552913f306dd2ca334c714098b SHA-1: b2842237816f808e063ef18dd091b0457d7f6769 SHA-256: fb0fb6c0908de6ee675dad9c4f1ab0b3e4bdec6272ae5255e7145f7a91fee46a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=spofford+pond+school+principal In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5fcc1de4b9e14.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/aChhgd4/62743384993.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fdde81dad30c.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ibhgXBS/skater_xl_maps_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/YjihdrK/weed_wacker_blades_home_depot.pdfIn PDF document text
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/9865097.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/jjDjbic/nicki_minaj_husband_criminal.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/vjfigzn/62000096790.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/romijitelarodizigefe.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/dfPyaia/jerava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ffe8452db9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_602c4497452aa.pdfIn PDF document text
    • https://wakokozetu.weebly.com/uploads/1/3/4/3/134307835/630d6745.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/zuponefi/co_tuong_chinese_chess.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/boxozobiwezomomi.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_off0001003e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003E 5344 bytes
SHA-256: 8bd749061422f3ddad968976d1e36315d76910e0429862639f8be85c45393463
font_01_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 10660 bytes
SHA-256: ef5ee8185809024d47462d2ea88e6a0dd146057eee17b34415a98325e5119cc1