Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df471f9e54933cd…

MALICIOUS

PDF

74.9 KB Created: 2021-03-18 16:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f5c6d2ddf41388de97a069a9d2b6b44e SHA-1: e38fd30317ba82b46bdc3b2fe21c20836ba61bdb SHA-256: 7df471f9e54933cdfc85441edb3c56698b13bbb8886d6916faf1447d61a09c83
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, and the presence of embedded URLs further supports the attack pattern. No scripts were extracted, but the overall structure and URL distribution are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=function+of+affixation+pdf PDF link annotation
    • http://optamorem.com/dungeons_of_dredmor_builds_magey8lj5.pdfIn PDF document text
    • http://alkim.xyz/nesozilumanukideduzujolqyfye.pdfIn PDF document text
    • http://kozlo.space/hope_for_paws_hermione_adoption8bm6z.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/42778756286.pdfIn PDF document text
    • http://mebets.xyz/albert_einstein_atomic_theory_contribution_dateadlxm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_6007119be8406.pdfIn PDF document text
    • http://rifivejawix.22web.org/67400188581.pdfIn PDF document text
    • http://golden-bridge.pro/togaxamovr0bum.pdfIn PDF document text
    • http://waxawazurutane.22web.org/alm_do_materialismo_espiritual.pdfIn PDF document text
    • https://cdn.sqhk.co/xilasexiki/f6hbajd/ranevupusexorimulowuturez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fff1368cc9cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_601eacced2a75.pdfIn PDF document text
    • http://vostokzapad.su/2403205803h31to.pdfIn PDF document text
    • http://strahuemsya.info/como_descargar_videos_atube_catcher1zf61.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jGNW7jh/mivituzikodino.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/emsifAo/21656580107.pdfIn PDF document text
    • http://meriline.store/mitus8kq4s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479715/normal_5fc612c52e516.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxexagixib.rf.gd/vesta_pro_bold_font_free.pdfIn PDF document text
    • http://kifilexaxinazer.epizy.com/genestealer_cult_kill_team.pdfIn PDF document text
    • https://94e55d9a-ad7c-4b6b-a54a-a00202ad3087.filesusr.com/ugd/208fd7_a3435fe2b4814eb2920408b5b9500732.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_d92c60cc501a48d0a4dd7c562f2b6abf.pdf?index=trueIn 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_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 4868 bytes
SHA-256: a64b56e40fa078ec1a8aa15273dfe3d81ea7e598aac3517bd5a862e60d77ba05
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10496 bytes
SHA-256: 32c3e83c4ec6faa27989e46215a642b6675781a329ffa78e023ec6dca7cc2d94

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