Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05889ae9320ab4f…

MALICIOUS

PDF

96.3 KB Created: 2021-04-10 19:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 41ad5522810ec9ea5710c1ecd555b98d SHA-1: 957282e6fb3b0649360079b0bd820a27435711aa SHA-256: c05889ae9320ab4f191153d53fb365ac6207bcf2b595e4a734bdd9cfd7662a60
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 0.9965

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://mezovuduw.ru/strik?utm_term=big+green+egg+grill+for+sale+ebay PDF link annotation
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/3832134.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/2hfXIhc/to_sheltered_side_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/hZhhvjf/download_turbo_league_mod_apk_revdl.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/inverse_gamma_distribution_in_matlabos4xt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481161/normal_5fe18269330b2.pdfIn PDF document text
    • https://satemegozujig.weebly.com/uploads/1/3/4/4/134477909/dinosururunovuluj.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/kuxitozegivumeliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_601be0fc21b8f.pdfIn PDF document text
    • http://zimomov.iblogger.org/starcraft_2_free_vs_paid.pdfIn PDF document text
    • http://allieshouseofhope.com/58172799078t6q58.pdfIn PDF document text
    • http://fortuneocredit.com/59271966519ixx49.pdfIn PDF document text
    • http://gajuduxotam.iblogger.org/different_kinds_of_assessment_tools_in_education.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_606b1791ca23c.pdfIn PDF document text
    • http://chestlune.online/how_to_bake_rainbow_trout_fillet_with_skin592gy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_6049f4a61a017.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/pigawumanetamufudt3tk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5ffc695e5440f.pdfIn PDF document text
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/nifurabebaxuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibijebe.epizy.com/tobuvogujujejebogigixij.pdfIn PDF document text
    • http://kiluwemejibe.rf.gd/coffeescript_performance_vs_javascript.pdfIn PDF document text
    • http://xopemaw.rf.gd/courier_boy_songs_naa_songs.pdfIn PDF document text
    • http://nizifewinuli.epizy.com/gebaduzavakuwoxemati.pdfIn PDF document text
    • http://pitalipe.epizy.com/sazazetaduliki.pdfIn PDF document text
    • http://xarozitapakegur.epizy.com/price_of_samsung_led_smart_tv_40_inches.pdfIn PDF document text
    • http://kalilom.epizy.com/weather_fronts_worksheet_answer_key.pdfIn PDF document text
    • http://ninovaxabax.epizy.com/stream_processing_with_apache_spark.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_off00013b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B99 5228 bytes
SHA-256: 38ff30a4be3b467be578f89fa18f4d9f11ea4ca1a5e3a3302f9e6faab5104015
font_01_sfnt_off00014d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D83 11232 bytes
SHA-256: 36d5d96bc3b52cdb4a0f67b74091d27d0f3c117d0d7342948621c21641611f4c

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