Malicious PDF — malware analysis report

Static analysis result for SHA-256 52145603100c5192…

MALICIOUS

PDF

76.6 KB Created: 2021-09-05 07:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aec5bafffac9ceb889c11bebec034a74 SHA-1: da40287102ce8bbdd504be9e1d8738c0485a046f SHA-256: 52145603100c5192a88f7d635367ced6347cb31f7059ba127e49f26fcca54380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The embedded URLs likely serve as lures for phishing attacks or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/eba0d2ca65f7bf059e887ba6745e1e9e/ranujinipozogalefubo.pdf In PDF document text
    • http://ddrwc.net/clients/869849/File/fixomisoxuveto.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e40422cf31---42097646134.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fb9a329651d43d4173ae1f2359fb475f/42537386348.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/91243364388.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/abbef1b74aa2d3ebe0fdddd19bb48a4d/febubitedimosa.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611c4381d2006---bavuzalegejugusajituki.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ck83hmijskjcbc3tuqqiqnsus7/pumar.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/35455031123.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/49473743496.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c878a903268---3354930308.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/65789319.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7038a183d---8619340231.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/bufazilasa.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/24386420999.pdfIn PDF document text
    • https://shinaltd.ru/images/file/dibexomolunodate.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/23003270814.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/davoz.pdfIn PDF document text
    • http://leguido.net/files/ninobupokorogilag.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/nipobofusiniji.pdfIn PDF document text
    • http://tencanpowder.com/d/files/zadogepowevozujakifirad.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/86ecc639ee624a2ce37bf8d6245b7023/masigojomururan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=arlo+netgear+base+station+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46D 10672 bytes
SHA-256: 0a24b0aec557b7b97b5c3c944d44592faf0784e8a5772ed2bba9b8ae2e32512f
font_01_sfnt_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 18592 bytes
SHA-256: a7951e8644e7e97b626df154eae93eb1ae35f325abe7c168a1278972e4d9af98

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