Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e32c490fa7e1813…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 00:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4f36daaf0c927d871b82c7029d5639b8 SHA-1: 5390c105e23b8a6a093a8eae1fa7abf1d75b455b SHA-256: 2e32c490fa7e181386bea929577e341435e384d7fe3ac597859845a4451a8f5a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/award?keyword=blank+piece+of+paper+pdf PDF link annotation
    • http://healsmall.space/python_dictionary_keys_sorted_by_valueo3bok.pdfIn PDF document text
    • http://mon-compte-cmb.best/pepegijusfa.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/51907c4abd29.pdfIn PDF document text
    • http://misstourist.info/7303344551nxb2h.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/giritawobinubil.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/sepobedulevebixapuviwakdlzs.pdfIn PDF document text
    • http://urro-hu.com/nfc_14-_100y1cj8.pdfIn PDF document text
    • http://natural-shop.info/92200463260yi8c1.pdfIn PDF document text
    • https://fejoburu.weebly.com/uploads/1/3/0/8/130813906/9389982.pdfIn PDF document text
    • http://slmit.fun/origami_heart_box_with_lid_easywb99e.pdfIn PDF document text
    • http://winclean-shop.space/mupatetapejoxenalarerab8u9v.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/fonerutoro_xoxadigegewege_kepisi.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/3648076.pdfIn PDF document text
    • http://newigatop.22web.org/salary_non_commissioned_officer_in_indian_army.pdfIn PDF document text
    • http://fezideruxojogo.iblogger.org/57686527201.pdfIn PDF document text
    • http://myshoes.moscow/59122428227f5n2a.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
    • https://uploads.strikinglycdn.com/files/5bc12284-3889-40af-be1e-9d3ad86ecc93/vijesu.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/22627332211.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/16547061272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752ae7eb-a8c2-4708-92e3-97f5d3753436/what_workout_burns_most_calories_on_apple_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/nodasezuwugusaxoler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50baeea5-4aed-4e8f-9e10-8daa09a7a2af/percy_jackson_series_books_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/52048042840.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_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 4792 bytes
SHA-256: 15d696514f5e684ee7d143ad4bd841194681fa9e3a36b18f2a2ece2a373628d6
font_01_sfnt_off0000e8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 12424 bytes
SHA-256: b09f5ced5aa86c3e818e1426b0afd30605a1eae63076130818e66631ad56a6b4
font_02_sfnt_off00011010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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