Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede1bbbf4c460b0e…

MALICIOUS

PDF

75.6 KB Created: 2021-02-22 22:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74a5cff7343394a0dc76cf31a6b68376 SHA-1: 3f386ae69ed8d15d9957740cac7b109fdcb5a900 SHA-256: ede1bbbf4c460b0e82a84ca9faa0e0f56f89ca28d8b3803b4e1dd90dbc04b114
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded links to external websites. The heuristics indicate it functions as a redirector and a link farm, likely intended to direct users to malicious or phishing sites. The presence of multiple URLs, including those pointing to disposable hosting and potentially malicious redirectors, strongly suggests a phishing or scamming campaign.

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.
  • 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/aws?utm_term=how+to+use+singing+machine In PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/paralivo_rijakomom_dakupeligif_wolibudi.pdfIn PDF document text
    • https://ranaxeli.weebly.com/uploads/1/3/4/4/134478161/8a7bf.pdfIn PDF document text
    • http://krokoboko6.xyz/9467523242jzl62.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/miketilupadi.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/KhbrQt4/59070113533.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/gezjigd/85527317508.pdfIn PDF document text
    • https://tonogedufeji.weebly.com/uploads/1/3/4/3/134378200/7465586.pdfIn PDF document text
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/b01f2848af7.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/xazumenupifovi.pdfIn PDF document text
    • http://contact-git.top/pimoteb7v4y2.pdfIn PDF document text
    • http://4escam-bot.online/notabaxadetuz0ib5.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/rgcjgpY/16327769467.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/666d897d.pdfIn PDF document text
    • https://wawowipibi.weebly.com/uploads/1/3/3/9/133997364/bd0ff9801.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/yhaQqic/ultimate_bike_driving_simulator_hack_version.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/geNieMf/match_3_jewels_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gigonusotomofi.rf.gd/61396647519.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 5020 bytes
SHA-256: e7872408735fa96debe0692cd7788e79b6ae78c9c5348db0bab95454bada6dd4
font_01_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 11168 bytes
SHA-256: 6a86c3b0167fe5cef3e71ab9b9154a62b9a15a9372f412e87010cd2b9e60453b
font_02_sfnt_off00011340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11340 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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