Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d948e774a04c81d…

MALICIOUS

PDF

91.7 KB Created: 2021-06-26 13:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a089b66c47ca5b375b2a0cb83edec4c9 SHA-1: 20d2737589257882ce1be01cabef18dbaa5563f4 SHA-256: 3d948e774a04c81d7708f6a6eaae783f8617de02b2f11e34ca5060231337e986
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, with one URL specifically mentioning 'download the sims freeplay hack', indicating a lure for potentially unwanted software or malware. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://status-go.net/gfx/userfiles/files/turubebojakujidexave.pdf In PDF document text
    • https://aslimitada.com/userfiles/file/vaboputoxituledonesivilo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607113c493ae0---rovudozugaxiburipowoja.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/lavesuj.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1bf68b0cc26038defcba4e4a5b427945/gebopevugutajoxef.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/27203695206.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/98190006595.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7179568348---fefotavojatifuviw.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079511e8a9e7---99947089537.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94aa25c34e---10415351860.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b96e0c2b2---29552464010.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894d33f3a43---tebepik.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s6k2l3vq2kng9gv7cr4nf9m00s/52276724522.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/86240840157.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/zumezanijadejup.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wubeneros.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a01975a00---70852800496.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/c8k7m1u8mf76belg66p74iabb2/6411935288.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/zekuwed.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3484d1e989ef615360553df5e0a3ff98/xuzugebowoj.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa94be70548---zodolawurubipip.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1d81d4a08---tebet.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ddd818b445b7514835ca0ccd808b7e34/zitomozuluwokixages.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+the+sims+freeplay+hackPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 11176 bytes
SHA-256: e6111853a608fcb1610415e1a4251b90f5917bc2fdc7e2980d707e89479adbe3
font_01_sfnt_off00011101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11101 17684 bytes
SHA-256: df353f812a2b3d41703b7775cf51fc490ea43c057edfd503330f633f09c1d82c
font_02_sfnt_off00013f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F57 1728 bytes
SHA-256: 81f277ff9ca9cd818deb606bd01635905cfcc4a95b7bb16f78738b4b14071178
font_03_sfnt_off00014791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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