Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b04440a87dc7df1…

MALICIOUS

PDF

85.8 KB Created: 2021-03-13 19:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0efe4413851331b37a098182b09ed957 SHA-1: 7ee80c36ef213f9626ce05a583e78543946a6942 SHA-256: 4b04440a87dc7df151007ae6275e1fb90a0e05ff4a631bdbcc14d2d8d594fd2d
126 Risk Score

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=4th+grade+nonfiction+book+report PDF link annotation
    • http://pusatokolerax.mywebcommunity.org/72160415985.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/cech_2501a_jailbreak_2018xj841.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/46653878275.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/ejfheDx/83899336629.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/dguekjK/turbocharger_vs_supercharger_sound.pdfIn PDF document text
    • http://italywom.space/fivezedofiwotosojzvr34.pdfIn PDF document text
    • http://good-production11.site/high_school_musical_breaking_free_piano_sheet_musictfmtt.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/hfvfhja/okay_good_luck_in_spanish.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/captain_underpants_complete_book_series.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/foRecDe/xudawomosuferid.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/accords_guitare_basse_dbutant.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/0F55ge5/gunojasubirilukep.pdfIn PDF document text
    • http://trysucre.pro/how_to_find_angles_measures4i2f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japinoxizidunub.myartsonline.com/gezikigulanamu.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_04452bb9e3f347138ffab6e8c557770c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/65899902257.pdfIn PDF document text
    • http://mawokale.myartsonline.com/what_is_service_oriented_architecture_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/xajuwetif.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/how_to_print_photos_on_hp_officejet_4630.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_a1359dddd8354c248afa2ebac6947bc7.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_cc5a1783e4e548e38f821ea75a1d04f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/aptoide_ios_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/learn_more_python_3_the_hard_way.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_off000111e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E6 5404 bytes
SHA-256: 3f619b02a87881013fb0eb38f9aa383e0339404c3d5548ae7ac8ca7f1cfb677a
font_01_sfnt_off00012448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12448 10640 bytes
SHA-256: 41d0d91771f23c8290605638958f6ec64e08d492ba5928366216569d1b908674

Open this report in the interactive analyzer, or submit your own file for analysis.