Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a10ef14608eafd…

MALICIOUS

PDF

82.0 KB Created: 2021-03-12 16:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f0493a05cf4f8dbf12514b459c3956f2 SHA-1: 522d91d6212f30cb7f08430548485103ca318273 SHA-256: 29a10ef14608eafdff78542181705ce32c1bdcb33b9f81205e7db801fa1659b7
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 0.9992

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://resalured.ru/award?keyword=download+surat+al+kahfi+dan+terjemahannya+pdf PDF link annotation
    • http://nesebonuvobeju.getenjoyment.net/how_to_become_a_leader_download.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/fjijgia/79934357020.pdfIn PDF document text
    • http://healingtunes.ru/menopukofukozegediganyjcu.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/dKdhh8K/games_like_daddy_was_a_thief.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/nadarisibugalawigenuludif.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/gewzdJO/weapon_builder_pro_apk_download.pdfIn PDF document text
    • http://constructionhouse.info/i_sing_the_body_electric_ray_bradbury_short_storyfuwg8.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/1995_jeep_grand_cherokee_limited_service_manualka8hk.pdfIn PDF document text
    • http://fitit.space/primus_trailer_brake_controller_instructionsb043d.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/i5ggJMa/dikatesow.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/samsung_refrigerator_ice_maker_not_dropping_ice.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/74772035444.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/QKBlgig/photo_collage_maker_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_5059a91a3bcc4c768172805418ddbab2.pdf?index=trueIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/51328510637.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_3ef882c2d5a4483db38c24425f889758.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_6177aaa91b2443d187b5ca6394c9af53.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_910f5a04e7bf4012a8378f5ed4088166.pdf?index=trueIn PDF document text
    • http://woranuganavot.myartsonline.com/density_worksheet_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a14060-9811-407c-810d-1885c8dba4ec/mejijulufawifamexu.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/introduction_to_audio_visual_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00519513-ef8f-4267-929f-bfc68dea153c/81575755070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196dd923-3aff-4751-8deb-2d7a4dfcfe4c/davinci_resolve_16_basic_color_grading_tutorial.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 5612 bytes
SHA-256: 7e44bde6ccad6b15126fd4b9fc16597b37074f012156f289792d510603b4e447
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 10228 bytes
SHA-256: 50d267486cacb655898a2240c57f25fba7b28edd08caf2225336d209f055e4fa
font_02_sfnt_off00012043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12043 17332 bytes
SHA-256: cfc58d9231a3eaa7e9121b21add1caae64016c03396a916f0fd0358cb937497c