Malicious PDF — malware analysis report

Static analysis result for SHA-256 b229f04ef859db77…

MALICIOUS

PDF

90.0 KB Created: 2021-03-25 16:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e1a93fc4a0cef5017456464c0b383218 SHA-1: 1c27acdaac3e8fb78a8bc9c849c0cc599579207d SHA-256: b229f04ef859db77f97644ac8bd9f2a65372978faa550ef929a0a05eb655c7da
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 0.9995

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://kuzutuzo.ru/123?utm_term=applescript+documentation+pdf PDF link annotation
    • http://vvd.bar/what_is_erasmus_darwin_best_known_forqxmh6.pdfIn PDF document text
    • http://instapriz365.online/stihl_hedge_trimmers_petrol17k6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_600c146becf44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501961/normal_60375aa24bcb0.pdfIn PDF document text
    • http://agent-ritual495.online/letter_e_tracing_sheet8tvql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_605bfe88cce1d.pdfIn PDF document text
    • http://save50.pro/4608705453l4irn.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gda4ib5/ouroboros_ring_in_gold_gucci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_6050d7012a8be.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/pl6djaZ/snake_ii_nokia_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/WeANhcv/furniture_designer_salary_new_york.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xevorerokune.epizy.com/bilerif.pdfIn PDF document text
    • http://dosebanama.rf.gd/14123938418.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/resomaritaselilitarine.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/watch_anime_apk.pdfIn PDF document text
    • http://metuvubom.rf.gd/force_update_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/camelot_pro_ios_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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0001027b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027B 5288 bytes
SHA-256: 02b8dab05ab8fce2a995e2c86272a16178dbbe78446bf747adaee86acde34109
font_02_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 2264 bytes
SHA-256: 9af14d0d4c4a8d9e8e5ae21fd63c199ba97fa05cc601b18c61389ddad095197c
font_03_sfnt_off00011ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAD 11340 bytes
SHA-256: 795717e6265464624bad42c3b9193a04506782ffa921d7f8632916c2c20958c3
font_04_sfnt_off00014595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14595 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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