Malicious PDF — malware analysis report

Static analysis result for SHA-256 637bbca767b2abd6…

MALICIOUS

PDF

50.9 KB Created: 2020-10-11 07:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 68d43affde7739df083a5cb1fa1d1c7e SHA-1: e7fba75189a26526fc1a4a88ef65bff692bf2cd1 SHA-256: 637bbca767b2abd61e9226e3b5a72ab74f7cd48c7bd87491d3d34c4363710d5a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=noapte+buna+puisor+sapte+puricit In PDF document text
    • http://jedujed.incaseofneedblog.com/uploads/1/3/1/4/131483068/zopoxalabipupirax.pdfIn PDF document text
    • http://files.onewomansomanyblogs.com/uploads/1/3/1/0/131070911/3600800.pdfIn PDF document text
    • http://kefapekiv.brendaswenson.info/uploads/1/3/1/8/131871710/tavene-baxubibono-demuxuk.pdfIn PDF document text
    • http://xalat.kateholland.com.au/uploads/1/3/1/6/131606339/c45c53d47f.pdfIn PDF document text
    • http://files.whatsgoodhollywood.com/uploads/1/3/1/3/131380052/eb095443f7221a7.pdfIn PDF document text
    • http://luvadi.gimmethelodown.com/uploads/1/3/1/4/131438044/dipaxawazonol.pdfIn PDF document text
    • https://site-1043600.mozfiles.com/files/1043600/fefapuvomuw.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/vovugolunevaberatofu.pdfIn PDF document text
    • https://site-1040665.mozfiles.com/files/1040665/laponugakenone.pdfIn PDF document text
    • https://site-1039174.mozfiles.com/files/1039174/61223216541.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/kixixubokabixusited.pdfIn PDF document text
    • https://site-1039889.mozfiles.com/files/1039889/jizemeri.pdfIn PDF document text
    • https://site-1041207.mozfiles.com/files/1041207/33439574764.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://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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4D 4884 bytes
SHA-256: 9bef413b41e2ee47653b4521b7d254b2d5c44fa2ef0a8c51beda8c53e7c972e1
font_01_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 2024 bytes
SHA-256: 6edd2dc65f8cc0d4bfc465674af3a6957927c9580e196fa1f2ecab0bfce717d7
font_02_sfnt_off0000757e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 11544 bytes
SHA-256: 142275f5d4ca3c46efa3c3c4d039b24983dfe829dcee1fff008d17c7a755d038
font_03_sfnt_off00009941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9941 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_04_sfnt_off0000ae48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE48 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176