Malicious PDF — malware analysis report

Static analysis result for SHA-256 3113d36413c3ef7d…

MALICIOUS

PDF

74.2 KB Created: 2021-03-09 10:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 058fd30cf324334e4ae88d5c72998a8d SHA-1: c7246a46dbefb3c66af2af91262eee8584bdcb43 SHA-256: 3113d36413c3ef7d0b61bccfff4ca22390101a2604caed82fd72d492f4380ba4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm or a distribution point for malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or increase the surface area for phishing. No scripts were extracted from this sample, but the overall structure and URL distribution strongly suggest a phishing or malware delivery attempt.

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://lozipotod.ru/aws?utm_term=postscript+on+the+societies+of+control+sparknotes PDF link annotation
    • https://cdn.sqhk.co/pigajifaw/ACjc5j9/tuduxelezoviwevibomoda.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/2aeb517a04.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hiidjdf/xuvavedetaduni.pdfIn PDF document text
    • http://pl50off.info/the_lazy_mans_way_to_riches7jm9w.pdfIn PDF document text
    • http://jifosorov.22web.org/how_to_fill_up_blank_cheque.pdfIn PDF document text
    • https://foguzutaporoma.weebly.com/uploads/1/3/5/3/135322660/garebuzukok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_602a8089d7253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5fe232418993d.pdfIn PDF document text
    • https://cdn.sqhk.co/bagekaketox/icAmihw/history_of_computer_books.pdfIn PDF document text
    • http://italywom.space/131421682812ae1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fc96965f21b9.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/gopupo.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/iidgcjj/illegal_to_leave_car_running_while_pumping_gas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_6018ebe9b8a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_602c03fd71a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_602b06e43c120.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/dWiiGhc/screen_off_video_recorder_pro_apk.pdfIn PDF document text
    • http://damita.fun/563989463132uiv4.pdfIn PDF document text
    • http://tovelksa.website/nasa_news_about_sun_lockdownu8465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevobademimebij.epizy.com/five_nights_at_freddys_the_silver_eyes_graphic_novel_read_online_free.pdfIn PDF document text
    • http://naziniri.epizy.com/58358627416.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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 5168 bytes
SHA-256: 093b7e73d73b4bd097329d831df789bc42e25aea800f6f76090bcd02fff4658d
font_01_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 9776 bytes
SHA-256: b40709f5660174ade39239efaf0a4aeb3d967852a842b3e43142a7a5f9a27a28

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