Malicious PDF — malware analysis report

Static analysis result for SHA-256 af05b9f77f71ea23…

MALICIOUS

PDF

67.1 KB Created: 2021-02-28 22:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c9c562a35d375da7eb5cca48dde2f38c SHA-1: cc22cbb4ba004df846348aae4089131e3a6b1138 SHA-256: af05b9f77f71ea23bbab37ef2c2ceb49f37dff4b9f944de1faa0f5d58b5ccf86
244 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.
  • 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/award?keyword=tp-link+tl-wpa4220kit+av500+powerline In PDF document text
    • http://dorightschool.com/crossfire_series_book_29ne1y.pdfIn PDF document text
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/3133355.pdfIn PDF document text
    • https://nerukime.weebly.com/uploads/1/3/1/3/131379394/b5353ab8e18e.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/jedupexepodop.pdfIn PDF document text
    • http://mivukiwoluwuj.iblogger.org/mozart_lacrimosa_requiem_piano_sheet_music.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/f4ec8f724.pdfIn PDF document text
    • https://labekefetimobu.weebly.com/uploads/1/3/0/7/130739294/lalovisure-pusolenajuna-davozesini-likimikibekusi.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/zovoforo-xarawawapunox.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/1307841.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/mupigozitawam-rewite-kafodarujivob-dutuzesigifize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/sepux.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/matlab_plot_points_without_line.pdfIn PDF document text
    • http://vimiromomekex.epizy.com/fipawetanokibagota.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/dugimavumopufowevo.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_off0000c575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC575 5320 bytes
SHA-256: 982c1298f54ee32639fc7105739a6f999dc1a42021c53d024e24dfae0b7a3ef8
font_01_sfnt_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 12424 bytes
SHA-256: 6c5dc24e651749ad5d7e1ca928484626043e4e599e411cc08adc6d9a6c0d306d