Malicious PDF — malware analysis report

Static analysis result for SHA-256 d653fd9ead409bf5…

MALICIOUS

PDF

91.1 KB Created: 2021-03-25 09:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d595ce9f4a29e05af12deea2d09c8462 SHA-1: 966d5eb1cfad3e92f7f88c404edc908ebf206fbe SHA-256: d653fd9ead409bf58634bd820011bc127da4b189427d78a97d9e712bc77ecc54
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 0.9989

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://dafemum.ru/123?utm_term=inventory+count+report+sample PDF link annotation
    • https://cdn.sqhk.co/sevafeluba/d7HaWjc/74515708.pdfIn PDF document text
    • http://ipai.online/roadmaster_granite_peak_24_weight_limit4uotx.pdfIn PDF document text
    • https://mixowobigasobu.weebly.com/uploads/1/3/1/1/131164278/tiwufij.pdfIn PDF document text
    • http://hhizmet.com/52449874468re0js.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/rasaxivumakidibaweke.pdfIn PDF document text
    • https://xekanowodupap.weebly.com/uploads/1/3/0/7/130739303/zaxanogej_daremamupizo_xawewejazot_nuvabinagujuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/jgzjhwT/39485735256.pdfIn PDF document text
    • http://devlp.design/filsafat_manajemen_pendidikan_islamgnpwb.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/Mjchnmm/occupational_health_center_pascagoula_ms.pdfIn PDF document text
    • http://bezprovodov.guru/statistics_101gmtok.pdfIn PDF document text
    • http://obzorov.site/dutubnrxfk.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/43726865307.pdfIn PDF document text
    • http://susurrus.space/nusuvapuzuvazamexinuvigqwhna.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/cunto_tiempo_puede_durar_un_zumbido_en_el_odo.pdfIn PDF document text
    • https://guzokilib.weebly.com/uploads/1/3/2/7/132741743/52969d2.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/tomebivikem.pdfIn PDF document text
    • http://virnet77.ru/mariruzagusabwryzf.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/c6cf3e97-b7e7-4848-b377-6ab30b976fb1/demetibexirubogomop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0ffa77-6104-492d-b40f-bd72301e8806/sifejedusajem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f786352-4f36-4802-879c-49a41cf14747/marx_robin_hood_castle_playset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2bc6fa-7e50-480e-9d33-34ac96b0a394/human_resource_management_project.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/how_to_use_jawbone_up_in_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4cde18-fdbc-4c79-a864-d67d11d5bf70/how_do_i_connect_my_liftmaster_myq_to_alexa.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_off000117ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EC 5012 bytes
SHA-256: 70e67798ffd4a87b90a38a5ec3b397e3ee7db1c57c79b3e9afd6b021c7bbd2ea
font_01_sfnt_off000128e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E4 11608 bytes
SHA-256: c7c43f3a71331fb5b1aebc8a28a42204bc7793686971b7535c83dc38a971015f
font_02_sfnt_off00015040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15040 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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