Malicious PDF — malware analysis report

Static analysis result for SHA-256 6794af7de5722963…

MALICIOUS

PDF

83.0 KB Created: 2021-03-16 00:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f29ddcf019e0ff8d8b1df73ce4d2cd SHA-1: bf69cf610230608a09d50536bdbe1d93b3562292 SHA-256: 6794af7de57229634a22bf182c6854ffad46a8fe0d1f5c086065b21d9154fddf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, suggesting an attempt to direct users to various potentially harmful websites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=sims+freeplay+apk+ios+2020
    • http://vanimerukaguto.scienceontheweb.net/how_to_change_the_date_on_a_citizen_eco_drive_watch.pdf
    • https://zejuraxarobepek.weebly.com/uploads/1/3/1/4/131407797/kimilabepotu.pdf
    • https://kebomekol.weebly.com/uploads/1/3/5/3/135349545/35bd82b0985cfd1.pdf
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/5349729.pdf
    • https://cdn-cms.f-static.net/uploads/4491159/normal_604d864869a50.pdf
    • https://static.s123-cdn-static.com/uploads/4487200/normal_5fe0913a26dd4.pdf
    • https://cdn-cms.f-static.net/uploads/4444104/normal_600deef0aea2f.pdf
    • http://torixobo.mypressonline.com/marathi_kadambari_file.pdf
    • http://maslovauto.ru/beaks_of_finches_lab_reportvmnbp.pdf
    • http://fulukegoror.getenjoyment.net/dionysius_the_areopagite.pdf
    • http://nijalatol.mypressonline.com/bakunin_god_and_state.pdf
    • https://static.s123-cdn-static.com/uploads/4407085/normal_5ff28f56a3e5d.pdf
    • http://forovasax.medianewsonline.com/c_data_structures_and_algorithms_cheat_sheet.pdf
    • http://mmeueue.space/restore_backup_viber_messages_androidv35cn.pdf
    • http://pelinebaj.mypressonline.com/noxirexavapaxigalize.pdf
    • http://zoxodur.sportsontheweb.net/remington_700_short_action_receiver_weight.pdf
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/tujesiti.pdf
    • https://cdn-cms.f-static.net/uploads/4452148/normal_604b1f5976af4.pdf
    • http://jsexj.fun/batman_the_dark_knight_in_tamilr8pbw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jokubamobivavum.onlinewebshop.net/dulijusabusadedurajalix.pdf
    • http://tivakifuzir.atwebpages.com/soriwefevakus.pdf
    • http://foxukekamusun.onlinewebshop.net/the_wrath_and_the_dawn_reading_order.pdf
    • http://gubadif.myartsonline.com/honeywell_hcm-6009_water_tank.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee15.bin
30e46c81a7f9dd157540856d8ea39c5e12086f66fdb1c1744516ad50feb3dfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 5588 bytes
font_01_sfnt_off0001010e.bin
ef9b124d85f828ae222c9e19dce583b5565cc0c47197557a95f07b1054b568b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 11396 bytes
font_02_sfnt_off00012872.bin
4de993fdf65467371df45ae604b44199a0f9db96dd1987693d1d6f13b22e4334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12872 16428 bytes

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