Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fda9472652e80f…

MALICIOUS

PDF

90.1 KB Created: 2021-07-05 10:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91192f33ce99716abce40344f3b7be91 SHA-1: 0a20bb757d3ba58808acbf38b6abc460e8d4a047 SHA-256: 54fda9472652e80f7f305d06a55d0ba0194a3470db0cd8d013a8653852898bed
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing malicious software disguised as a browser update or extension. The presence of numerous links to PDF files hosted on compromised WordPress sites suggests a link farm used to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2237b792ad8f874910d1a9b15bc21c42/nokogurep.pdf
    • http://sequirk.ie/userfiles/file/69416846320.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6cr309p296vjs59ldoos1e0qr3/60094960000.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2k45bqjqj3nluficpsfvd2n306/60806402214.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ba3bea40d---zaxapimaxavoneza.pdf
    • http://fabtur.ru/upload/files/wepukitimunanuzazadexon.pdf
    • https://adsbudget.net/userfiles/file/kokegusupotojivirexud.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d22eda111ea50691b463d211ab9b1ab5/98780296852.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/uojkd3vohpmkjb6mkg9bf4247d/motumetopo.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/712ac0d343db2b40a24da7bb96d03e12/88426481088.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f66c742bc---jumobogokirutoloju.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/50bc21002286a7a645e9a88d05472280/puwutedoma.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ea3b8995f---81072314882.pdf
    • https://reniuved.it/file/65195951551.pdf
    • http://seabeachthailand.com/UserFiles/file/xokatizofelenoreporew.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f9c75099---86006850572.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e2067e8f8---4167078073.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fe561f252---16413509391.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/01152bc1755ce89dd92d9a71dc1b0dae/guzelulugexukodaviduvim.pdf
    • http://labonguyenhoang.com/img-chamthi/files/46220852003.pdf
    • http://maidichike.com/upload/files/zogeked.pdf
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/1b030e264a29e42d26df44d50e69322c/dutolojaborofosafoxig.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16077715a1decd---81045245546.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082d1a4d398e---nekokaxiluta.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c998b587a---xovipojapewo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=apocalypto+full+movie+hd+with+english+subtitles+free+download
    • 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://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_off0000f9b6.bin
828d2d8eaf181fba74c66569cae28cd91d72a0ebca0f99d45fb00cb949554d74
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 11556 bytes
font_01_sfnt_off000114a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 16792 bytes
font_02_sfnt_off00012cb3.bin
d5c72957fb876b9fb12ec1190c8151f6708529b160a00f6b57ab973c677672ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 17324 bytes