Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d985a9ceb63a90…

MALICIOUS

PDF

97.8 KB Created: 2021-03-13 16:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b71ca5eaccc579c7c26a3db6cb4976a SHA-1: bd73d80159f0d97cf427a386f488f16004aec904 SHA-256: 15d985a9ceb63a907b6a6202bfd6e8336978fec801bd00273532d7eaa3d42222
146 Risk Score

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. It uses a QR-code lure. 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 0.9981

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://druttle.ru/123?utm_term=uc+browser+chinese+version++for+iphone PDF link annotation
    • https://cdn.sqhk.co/jeporikate/gdibJME/judufiganop.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/additional_mathematics_textbook_download.pdfIn PDF document text
    • http://waxawazurutane.22web.org/60698147304.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/mhjhcyw/99482182448.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/mupetilujufulemuzavaxel.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/CA7jdKo/gipodoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/G9ifE1E/judge_judy_children.pdfIn PDF document text
    • https://cdn.sqhk.co/rizanatu/I3gdjfe/alchemy_war_clash_of_magic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tanonarimunal.myartsonline.com/how_to_change_schlage_encode.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_9242fd625b88461baa096838dd29650a.pdf?index=trueIn PDF document text
    • http://larujuzo.rf.gd/free_risk_heat_map_template_excel.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/49533179644.pdfIn PDF document text
    • http://katutexe.epizy.com/jon_duckett_html_and_css_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567b957c-1938-43c0-a698-1ac167d18bed/fuvikezafinub.pdfIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_701062f1a56542f2b817241e98e0fca9.pdf?index=trueIn PDF document text
    • http://bakofenomuzinu.rf.gd/gattu_battu_wala_game.pdfIn PDF document text
    • http://rubijisezet.epizy.com/parental_consent_form_template_for_filming.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_2e3045555b9f47d29391fa2b863ee3c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f3550e-2f70-4651-bf88-bdbe25ed8e7a/freelance_graphic_designer_jobs_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eebb208-48f6-4c8a-b13b-cf7076f3fadd/tuloza.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_466cc529cd434e5b9db5e38bcda93bac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9cfb3a-ee01-482f-9d17-fff461e7dd11/38751025207.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_4f0d765f41bc4fc6ba662b00710ccda3.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 2900 bytes
SHA-256: af1faac4edf213704ac67f95ae914594ebf3f706b38aef9b4bed1d7a70441c81
font_01_sfnt_off000127f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F4 5144 bytes
SHA-256: 1ca2764925065606a35454db07bb3409265fea20f32ed5a49b2ac3efc6d1a731
font_02_sfnt_off00013991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13991 13292 bytes
SHA-256: 67249854888e04ef4957bc9280ffe9052ddb9ca9a630560332f8c888be5dc1e0
font_03_sfnt_off000163c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163C2 16296 bytes
SHA-256: f18bbeb39ce0ec1069eeb9033ef9d17f1cf20ced6faa2b20464ee46a840cf745