Malicious PDF — malware analysis report

Static analysis result for SHA-256 93be0647808e4e22…

MALICIOUS

PDF

76.7 KB Created: 2021-03-17 15:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 016d7f0457d7d2be7ec1a4485e165177 SHA-1: b1eebf197e1adb2581fd22aecc8f329a16f5a88d SHA-256: 93be0647808e4e229f5fb71513933b9fed0d909b5b73db00822246720980cc61
186 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 0.9995

Heuristics 6

  • 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 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.
  • 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://pelibifir.ru/strik?utm_term=remington+12+electric+chainsaw+parts PDF link annotation
    • https://cdn.sqhk.co/fedelubu/tphBsgc/degumadozu.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/ggEieia/81484032621.pdfIn PDF document text
    • http://vejawezodasupax.22web.org/what_are_the_advantages_of_genetic_engineering_in_humans.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/grSG6j3/91609285125.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ggiggww/74013823.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/hiK2Wgj/brain_out_online_game_unblocked.pdfIn PDF document text
    • http://niruteluw.22web.org/september_2020_printable_calendar.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/jc8pLhj/star_wars_rebels_sequel_series.pdfIn PDF document text
    • https://cdn.sqhk.co/konarolikomu/h3hfUgf/3340455750.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/wWIjbhf/whisper_of_the_heart_cat_baron.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/LagcOG6/best_dance_songs_70s_80s_90s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d812ff6a-2a4c-42b0-bc4c-8845d6b57743/wabitijapunezofim.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_93a3142dfc5946639fd9c59d071eb386.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_c3d038e5d21f48f98c0d8130e7b59f66.pdf?index=trueIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_630ba2943a4440ad915a6db27691fd55.pdf?index=trueIn PDF document text
    • http://lodusebivepakef.epizy.com/dejabeziwetija.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/89586793301.pdfIn PDF document text
    • http://pepagipil.epizy.com/lirobedirexevadofezisawa.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_fbbf079a52404025bfdeda38b82270c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad0a863-2f9c-4790-a396-dc57dfda140f/gary_paulsen_hatchet_books_in_order.pdfIn PDF document text
    • http://nelekilegel.epizy.com/pipefedeg.pdfIn PDF document text
    • http://rowigos.rf.gd/edexcel_gcse_english_language_examiners_report_2018.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5632 bytes
SHA-256: 7a828fb4b93e6fbf3f4d34c789884d18b3d85a3a4681cf586c139ec17838a126
font_01_sfnt_off00010188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10188 10592 bytes
SHA-256: 54322fa46b69e3aee45f133c031b9a4ef2ca66955995d18420d96d8cb347c862

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