Malicious PDF — malware analysis report

Static analysis result for SHA-256 78aa98996ece2cd8…

MALICIOUS

PDF

105.3 KB Created: 2021-05-26 15:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e98d2e5b8e33dcd389cf2e826bc97b82 SHA-1: 59791c6098cc2221610f5960d7147ddebe379202 SHA-256: 78aa98996ece2cd813ce858b6ca14033f173eae7b9cc85f49069e181aa7cf374
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9864

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/strik?utm_term=nombre+arabes+y+su+significado PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374540/normal_5fcd285ce77d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_6044f44933592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_5fd0a02e4a156.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/tusigotod_wupaxaboxigis_kuboroje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_6052731d248f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_600d6f2a13641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fef8f71c3538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_60400476ba96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_604695ac68bfd.pdfIn PDF document text
    • https://wojagezut.weebly.com/uploads/1/3/0/7/130775605/vavinasirizevad_goper_vulosaw_muvalaluxivosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_606896b21fea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_6069e67770fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_605bfbe7f0380.pdfIn PDF document text
    • https://xemudimiju.weebly.com/uploads/1/3/4/8/134861016/zojigoripelor_bepenir.pdfIn PDF document text
    • https://doxidadawod.weebly.com/uploads/1/3/1/3/131379698/lenabedibopa_kutuledodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_6014484210a23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407793/normal_5fff304e70115.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/06dc19fe-9806-4089-bc69-a887846974bd/yamaha_704_remote_control_cables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76f1244-c90b-468e-915f-89f3a7910684/how_to_set_time_on_sharp_atomic_clock_spc900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d18f91-a19c-45ae-bb8e-af08ee857ff4/how_to_setup_epson_artisan_1430_wireless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068e8a65-b695-4f72-ac86-a8cfc7e16e42/revas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad32996-0d74-4551-993a-b726eaac2881/sanijoxufotataja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c731bde-9739-4fa3-a4ab-8a78250447a7/are_the_star_wars_books_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091b3177-400d-42cf-9c02-486fdad343fa/how_much_do_housekeepers_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6c03e2-fb66-4f5d-ae46-0a70385d5b48/what_does_the_bible_say_about_loving_your_enemy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c60adc-aca3-4544-8e3a-f854fefbd122/hkey_local_machine_software_policies_microsoft_windows_windowsupdate_au_windows_10.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000155fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x155FE 28012 bytes
SHA-256: 3aed0ea11b4a2c967099622ffcf5c44ef8e0027d5fffa327c94604003d5c3eb5
font_00_sfnt_off00011801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 5324 bytes
SHA-256: 57fdf8c168e7da6592de28299a195baaa7bbddf6e93b564a60837bac75fe9288
font_01_sfnt_off00012a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A00 14900 bytes
SHA-256: 5dd4a8bc8cffadcf600f33e3ca55a1672cb5d9d84f0d7f1138269a329e6f403b
font_03_sfnt_off000186fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186FA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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