Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe6c035756a988d…

MALICIOUS

PDF

79.2 KB Created: 2021-02-20 17:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 972d5107e2c2b0f97e2e1f546743a1d0 SHA-1: 5c85f55446b8b67307f15e9bbcd6547b86018fa5 SHA-256: fbe6c035756a988d7e2b69b705aac0f84f979998e34295c69e5b3080080c85d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site offering a 'casio g shock watch 5522 manual', suggesting a lure to a phishing or malware distribution site. The presence of multiple disposable domains and link farms further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=casio+g+shock+watch+5522+manual PDF link annotation
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/9040376.pdfIn PDF document text
    • http://losewunisa.22web.org/81512994675.pdfIn PDF document text
    • http://akb54.ru/automotive_lighting_market_reportd08oq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5fd1d2ebf1c3d.pdfIn PDF document text
    • http://obzorov.site/84894901864xshtn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe5609fa5dbc.pdfIn PDF document text
    • https://cdn.sqhk.co/mebozesilo/jcaghgO/sms_a_cuba_gratis_sin_registrarse.pdfIn PDF document text
    • https://lugexobamav.weebly.com/uploads/1/3/5/9/135965248/pasewarovepap-tulawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fecb059e5b40.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/3gchblo/planets_from_the_sun_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fdf6296ced22.pdfIn PDF document text
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/8430418.pdfIn PDF document text
    • http://nicechange.space/mivalodimivazimitafurowv1o2.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://pewesinelukaveb.epizy.com/ceremonial_definicion.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_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5316 bytes
SHA-256: 7d4184c5c5c445d68e8f386d527b22a9170b3504b852e7dbb52cfb8f0352d75c
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 10428 bytes
SHA-256: d6a1bb90c54ba9261efaa7c2ab23aabed5666c49f36519a1a1c7cff091095e33
font_02_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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