Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e101e975fd45e7a…

MALICIOUS

PDF

106.0 KB Created: 2021-08-31 04:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3ae6ef3fcdcf85462021fa4d90c5dde2 SHA-1: f954ac795c08b74fbe04d8186a751ecfa4d9a2c6 SHA-256: 2e101e975fd45e7afb46ec976fca4dc7b0f5c83e8f55e89e9c04962b020eb210
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to numerous external URLs, many hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL distribution strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://cottonweb.net/userfiles/file/32725151990.pdf In PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59b30160558bec40482390fa110981b0/8785582498.pdfIn PDF document text
    • http://unsersohn.ch/images/file/84572521530.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/48296400533.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/pisiziro.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160759d2ae7363---ratoxizipuforezosevo.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/79260956113.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/jowegilif.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5caf97347---womejiki.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096044de3fee---71043719752.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7a02d33e78c74626acd8954c2ec75937/dumupu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pg2v603i36fel2qg8ga1rem6f1/61521654684.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/kilazirisefusizazukuz.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/93681527687.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/fagadulakagalig.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/bidapudiwigexu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076061e2a515---98950026478.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16075866a0cc90---59862959115.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/pewibofotupevunavuvibetaj.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/55773202924.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80f80df91---jejetikerulob.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/koxogozevimobizito.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60d332fabb---36542006573.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01f035f75---79509347952.pdfIn PDF document text
    • http://ruihuitax.com/files/file/92413889589.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/fuzexekemiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+train+your+dragon+3+free+full+moviePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13408 11060 bytes
SHA-256: 3d837986c42e9319a0d0fe0523fb97089c825dc202c5eade4a18ccf11f79d4c0
font_01_sfnt_off00014da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B2 19640 bytes
SHA-256: 6d8765d26434b4e3fb9b2a5bd0c5ca71dd733580d1328ee3bead42f61767e930

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