Malicious PDF — malware analysis report

Static analysis result for SHA-256 7026d318e611a0b9…

MALICIOUS

PDF

71.4 KB Created: 2021-03-28 01:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 95269bcbf3ebef2d0fcafe12a7507947 SHA-1: e013363cb4aca83c7f93527c007a1ad3efb9b7c2 SHA-256: 7026d318e611a0b9d76bb92efef492be8aa7d4c16521d021b793c0ad2261ba69
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution scheme. The embedded URL 'https://resalured.ru/strik?utm_term=take+me+there+chords' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=take+me+there+chords PDF link annotation
    • http://vitofemegawe.getenjoyment.net/69531579331.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/inheritance_paolini_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5ff3f31b1c2e3.pdfIn PDF document text
    • http://getcabinets.xyz/social_learning_theory_criminology_bandura05ik4.pdfIn PDF document text
    • http://help-igcopyright.xyz/badifi8u3dl.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/how_to_cook_beef_roast_in_power_cooker_nz.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/data_analysis_and_report_writing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457311/normal_600346014e0b6.pdfIn PDF document text
    • http://kismyketio.com/resume_cold_call_email_template48vdg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_6016d7fc5e2af.pdfIn PDF document text
    • http://hookup154.space/argan_el_arte_modernozanju.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/fe330d98-eb05-4ec1-b7ae-e7f5ddc04f45/napejutapubunej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0c4089-1521-48a3-9c3b-e4bc055844d9/harry_potter_wand_quiz_pottermore_playbuzz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893ed355-d08d-461f-802e-32112976b4af/how_to_find_wps_pin_on_canon_printer_ts3122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76633861-f3c4-418e-9064-6c0d1091a647/piwovuvununefafimedadewuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ed3ef4-80b0-4986-b54d-940b325c4696/what_is_common_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f3d470-9dbf-47b2-863a-e3a14667c649/98565731436.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_off0000cecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 4796 bytes
SHA-256: ee52a6c90afdbb851e71264a65d798830b1ac96d9523454359768f9740938cd6
font_01_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10432 bytes
SHA-256: 0986cac78e32a216942b77ed34f9afc4e471c81903e9d59cd07d80023df94d37
font_02_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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