Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04c5726dac67e8c…

MALICIOUS

PDF

75.4 KB Created: 2021-03-29 06:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4589853411a1ea2c3b7aa647ce0ebe92 SHA-1: d0af55759a38380b21e38c26eebe59539f63d18b SHA-256: b04c5726dac67e8c403cd7c1c4d06c8cc43a9c1bebc72065670c03cf87c3bbe6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://xezojetit.ru/wix?keyword=india+v+pakistan+2019+live+streaming+free PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/jaSjchK/maxamis.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/jdjjbie/cross_border_xpress_cbx_san_diego_ca.pdfIn PDF document text
    • http://duplicwcnj.space/the_four_agreements_companion_book_pxw07z.pdfIn PDF document text
    • http://psychologyrelax.xyz/vinujokabujokirarazvn2m.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/jokaxuze-fapera-levoposoxezoz.pdfIn PDF document text
    • http://haustova.com/7734754655ro1fy.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/1646465.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/cuantos_cm_hay_en_metro.pdfIn PDF document text
    • https://ropesafubisok.weebly.com/uploads/1/3/4/5/134515157/756cdc9a.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ijiSgif/44011530455.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/what_are_the_duties_and_responsibilities_of_electrical_engineer0wjpz.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/bGichaJ/chuchel_game_play_free.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/logitech_m557_bluetooth_mouse_not_connecting.pdfIn PDF document text
    • http://help-mediasupport.com/pufijilovxhfp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/litunux/can_you_gain_muscle_with_calisthenics.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/aquasource_faucet_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fb368d-8224-4b2a-90bd-bea664f5399a/xegobe.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/federalismo_y_centralismo_en_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/glacier_bay_teapot_faucet_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce07cd5-478f-4a03-a2b6-179aaf78713c/red_burning_spot_on_skin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe828304-5ee8-4062-b59e-1498622d34f0/principles_of_microeconomics_9th_edition_mankiw_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/mixed_adding_and_subtracting_decimals_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5f2e1f-a3c5-4931-8dfa-61786c62e972/graco_magnum_16w119_project_painter_plus_paint_sprayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade00eb9-449d-4ce2-b792-f0912a41741e/how_to_remove_lg_tv_screensaver.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_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 5904 bytes
SHA-256: 1118e9eb2c018416903922c762420fd70750f6048a0bd9c34c055988fbb72fe3
font_01_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 10424 bytes
SHA-256: 358a6ba08a39aa5689c9377dcbd7deccdf453411a68a053b586ca3174a59cd99