Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8688753decc107…

MALICIOUS

PDF

78.6 KB Created: 2021-04-09 11:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ea8052841b6f527194e2ce80708ad034 SHA-1: 917925a4c9d4f38b6709ffc1ffbb9d83c2f9a290 SHA-256: dc8688753decc1071f891eeb1adbd0e0cfef9cbdff859fd67d9b0969fda28405
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 0.9993

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://nipisod.ru/strik?utm_term=boy+scouts+chess+merit+badge+worksheets PDF link annotation
    • https://cdn.sqhk.co/xafileme/svjirAi/bank_of_america_blocked_card_number.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/Fjckgfr/whatsapp_chat_backup_from_google_drive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414487/normal_60072eabf400b.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/giidKib/sadasireranapixojano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_600f756a78815.pdfIn PDF document text
    • http://kalinakudukutim.22web.org/31420258321.pdfIn PDF document text
    • http://mestorating.ru/photomath_plus_free_download_iosfdo6z.pdfIn PDF document text
    • http://nuzalozipofeven.22web.org/jeevan_labh_836.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/2hgUVjd/umc_hospital_new_orleans_careers.pdfIn PDF document text
    • http://jushq.club/43984177275jqg6h.pdfIn PDF document text
    • http://verifedform.com/tukumixebovddem8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fd89bb163b1d.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/qhgghia/patulozulifujonafij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_6056710640cd6.pdfIn PDF document text
    • http://idealica-co.site/6878677198094zgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6046c9270e669.pdfIn PDF document text
    • http://agent-spv.space/grandparents_day_ideas_for_middle_schoolbg2pq.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/jaLguWV/wupamumuriberoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://napupitupevis.rf.gd/crosley_c6_record_player_bluetooth_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/gizalasig.pdfIn PDF document text
    • http://sutazobizomobuz.rf.gd/peugeot_boxer_service_manual.pdfIn PDF document text
    • http://nemebikox.epizy.com/animals_maroon_5_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/childrens_stories_online_free_to_read.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/ccna_security_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/philips_norelco_5000_trimmer_manual.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_off0000f39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 5768 bytes
SHA-256: 5d545ed7bfb6d34a445ffd3fa7bb354a62a54e5db29e64ef49862a3ba1641d69
font_01_sfnt_off00010736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 10912 bytes
SHA-256: df5d7dc46df2285eb2995d771cf50184f09233aec378a4dc28632c1bac9d5843

Open this report in the interactive analyzer, or submit your own file for analysis.