Malicious PDF — malware analysis report

Static analysis result for SHA-256 760a6794eb40a80a…

MALICIOUS

PDF

77.6 KB Created: 2021-03-07 10:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bfbc2d680728881fa361185c58df02b0 SHA-1: 9342ec5c54d9f49250d95c0433fe1f98252764a8 SHA-256: 760a6794eb40a80aeb0680fdd20c7ce702437c6d912dd24a1fcafdcc5828ecce
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support 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 0.9995

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://leonvi.ru/aws?utm_term=viper+remote+start+installation+cost PDF link annotation
    • https://cdn.sqhk.co/matikefateri/jpftijc/nimufezavurafarujebogep.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/fgflhhb/mathletics_student_book_series_e.pdfIn PDF document text
    • https://cdn.sqhk.co/xekowodu/gii4nhe/29632684969.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/dkQDsjd/rizelenuzexutide.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/T3nsYTv/dune_tv_series_where_to_watch.pdfIn PDF document text
    • http://boomerangoo.site/bedarakevumemelexepkcvng.pdfIn PDF document text
    • http://abreudesigns.com/download_game_basara_2_ppsspp_android_isod85tm.pdfIn PDF document text
    • http://free-at.pro/5347846377482a6d.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/what_genre_is_robinson_crusoe.pdfIn PDF document text
    • http://subulowopuriko.iblogger.org/reinforced_concrete_design_to_eurocode_2_7th_edition_free.pdfIn PDF document text
    • http://muldwych.com/how_would_you_describe_the_great_lakes_gurgaoneied9.pdfIn PDF document text
    • http://i12tws.website/54985298685xa3ce.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/8f2afd9b-f74f-4b63-a81b-7022c2db2c7e/dna_replication_coloring_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37f1635-3de4-4ef7-ba67-642d8ae48cd8/what_is_tales_from_the_loop.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/17522935516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce11afa-d399-4e27-876d-02ceb113076a/1994067702.pdfIn PDF document text
    • http://wixobemiberug.epizy.com/fortiswitch_248d_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8f6d8c-5929-4024-8b7c-3a0a1734e21f/48282292652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf06a1-3641-4d65-bca0-82bbb53cf6ca/51922865065.pdfIn PDF document text
    • http://xesijapapun.rf.gd/ferrari_458_spider_price_2019.pdfIn PDF document text
    • http://molezegifa.rf.gd/94090031714.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/criminal_case_full_hile_apk.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_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5044 bytes
SHA-256: c298612be4bead84ca00d8b9157f23706f53d88ad21e7f378ff3b2ad7bb987fe
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 10680 bytes
SHA-256: 9577b0bd4740df433be84d2b64e0a995d9fce312bec919ef2899e516b9645597

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