Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf11336217556c79…

MALICIOUS

PDF

84.3 KB Created: 2021-04-08 03:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 968295c831cece7a30acc151c9c62f77 SHA-1: 530f939afff67a3333958637ac6d4f79a6b242fa SHA-256: bf11336217556c79b9b5733282d4c6c12fee7ed8b9ca31f9d5ed6ae3f602cec8
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 0.9994

Heuristics 5

  • 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 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://jacksth.ru/123?utm_term=advanced+candlestick+analysis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385614/normal_601d9e593be55.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/6hchjVT/visuxemekutunuliso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_604ad60999a21.pdfIn PDF document text
    • http://wapazezaduv.iblogger.org/retim.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/aweiegh/12622886496.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/8gchd4M/tutamumobivazuwawuvaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/TgjBghd/watch_ncaa_football_championship_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/YYjjxwP/pexijakawutudifufiru.pdfIn PDF document text
    • http://xexogafuko.22web.org/62106123891.pdfIn PDF document text
    • http://bojidodug.iblogger.org/vibiboduzexigopibarakorix.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/QDfcvhi/recent_apps_screen_android_pie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_5fdb36742fc1d.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/beautiful_love_quotes_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/kisoxukapab/camghde/videos_de_build_block_craft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vovugawe.rf.gd/112543069.pdfIn PDF document text
    • http://regipegor.rf.gd/kajegumo.pdfIn PDF document text
    • http://gaditimotef.rf.gd/76348526381.pdfIn PDF document text
    • http://zaponabugati.epizy.com/fotazipojedifivokimupigo.pdfIn PDF document text
    • http://zadalonidiv.epizy.com/levigijitawafigodoxogasa.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/find_vertex_form_of_quadratic_function.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/we_dont_care_lyrics_bugzy_malone.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/30382114098.pdfIn PDF document text
    • http://wiwafejopof.epizy.com/butler_parker.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_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 5268 bytes
SHA-256: e3a82871b30c6fba5a73bda597ee9b1c1f96c0ca53cae5bbb62f1c8c7e4a6c79
font_01_sfnt_off00011d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 10864 bytes
SHA-256: 90e97da576dd43fd5d84fe65e6d6f4eaa169b92ecfc8caff66f0c2bc7f8f49b9

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