Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6a56d41c3cca3c…

MALICIOUS

PDF

77.4 KB Created: 2021-04-14 10:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9b55e2f4f2a7f66fef30806de1ab5b4 SHA-1: 5b8efb14eda1c9877f55e836ef9749cc52b5875c SHA-256: fc6a56d41c3cca3c3834e3a16a20d8cd572380c96f7ac626e1639cb90565439e
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 0.9998

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://lozipotod.ru/strik?utm_term=how+to+use+gopro+hero+4+as+webcam+without+capture+card PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/gcPXovt/name_the_eight_planets_of_our_solar_system.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/ijdeibl/wooden_hamster_cages_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/litazujizime/ijjIOBn/psplay_psp_emulator_apk.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/nusuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/TocfccP/rock_music_free_download_mp3_2015.pdfIn PDF document text
    • https://reravojune.weebly.com/uploads/1/3/1/4/131406269/pibemunaferujomuzul.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/238acab0800.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/0hfHghy/change_my_voice_app_download.pdfIn PDF document text
    • http://kazezol.22web.org/51535664900.pdfIn PDF document text
    • http://talivijujod.22web.org/20212065933.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/fjimhgN/offline_youtube_video_downloader_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomujajimulewut.rf.gd/41301248648.pdfIn PDF document text
    • http://futekewibebok.epizy.com/is_a_pawn_shop_profitable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9911ed-bf87-4823-9ce3-c21c8fc830b3/35991069607.pdfIn PDF document text
    • http://lenopebimuzisit.rf.gd/2325530750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9316e96d-2139-4345-b40f-b1a7e6078065/51053878677.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 5736 bytes
SHA-256: 24f97b05fd0da40b81ac5bb258d4353125f656a9a47eb973cb6b38d0fbe36b0e
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 11372 bytes
SHA-256: 767d170d9dfa715c74ee6fded446245c53587550fff089a86e7091752c17e9fb

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