Malicious PDF — malware analysis report

Static analysis result for SHA-256 902a603d3e022c13…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 23:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 982fc05f12d4d464255376a4491286be SHA-1: e071025d30e651a1dc825bb03d5ab4e353fb450e SHA-256: 902a603d3e022c13705603ed4f2fe15898667d99bd30911311029bc013817e3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7bfedb284d9b12f312b50ffec680dd91/56214818020.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a79e2c0fd27---vetodovadurusuwiji.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1995fe0cbe19c7525170ab04a017404e/86760504847.pdf
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/vujeluwumoxubuzar.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ada53ac20a68303de5cd3067de12130e/lodapedane.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca5906f643---xedepijidabo.pdf
    • http://bbfrontedelmare.com/userfiles/files/xijunuzuwukubuzopo.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c02da68f---jinanabirukewanadiwezosaz.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607caea2e33df---tiwukabokaremidivuxezex.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/7346e73944b9c9b74baa5dd4bb3103e1/roresumes.pdf
    • http://humanitool.ru/userfiles/file/63293697968.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb9fa5c20---74797085238.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/89d294508a147d277d4d385a4906b025/bavononimitofil.pdf
    • http://vidol.nl/userfiles/file/nadanubexaf.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40ce9755bb---poweruraw.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/333afadd5eb55c96f156c1ef250919be/5071253068.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609b81275d088---tilesubiruwipakuxizejadim.pdf
    • http://midel.me/userfiles/file/83596986429.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b67af6c13d---wixinob.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0032e86f11e46fccc0114b0aa17e4d02/69610291047.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb62b6988---fepigov.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tqgh5pd7h8ftjs1ejbrisqt317/dexujotepinalus.pdf
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/51006909782.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=old+tamil+remix+songs+free+download+mp3+a+to+z
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9af6eba83e7ce46679f2c55511b322c6/rezazazotojinulefupanapob.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://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_off0000ed42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 16792 bytes
font_01_sfnt_off00010559.bin
25f2ec6e23ce0832bfb6ca12393ac44303409221eb0bc97842f85dceef05a770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 11284 bytes
font_02_sfnt_off00011fbc.bin
295fed33475a019db1a0fb5194332aed063a9b221f4550517fbc5c375624c4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBC 16980 bytes

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