Malicious PDF — malware analysis report

Static analysis result for SHA-256 832b2abe3aab795f…

MALICIOUS

PDF

81.9 KB Created: 2021-09-01 17:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e334eebaa05ed3169989bb445fa557c3 SHA-1: 0f9419ca4e9ae2ae38939cd61f24e44e582a087e SHA-256: 832b2abe3aab795f7016e6682456aa243ff72fac9883281cfa8693cc1fdc0cec
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, designed to redirect users to potentially harmful content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kryotherapie.net/neu/userfiles/file/32004349488.pdf In PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/71607264847.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/pisegomoxovar.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2a22f88642c361e23facb1dcf45f9350/kevogag.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/87de3fa2cef0f95e32874c93690bb4ba/petepurodadabozo.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/94435427312.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/sakasisap.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b42a3af15d4---23009716914.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/8504507c28cf96c3309b6c1af8d9c8cf/91097633476.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eb18383a3---sukalabowufotokagu.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/gimizakaritimosapoju.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/jajikefalexowujexetuguduz.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/dajafowabipaxe.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/c3acba4055ba4c7ee6ff10822676af3c/34256866999.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/96ce673f83cf92a0bf12313c039de124/xodewotapuvopizo.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ate742pr81nu0celfvsoqs5lom/nadenijuruv.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/16446420466.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080653e68b42---vopedekixigevimumil.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b881204c3af---lizuwezajudetoxuf.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9f0724a2e---6920673168.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/modulibetodarazekurug.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/q3bap0frpt7oaqqu00ga53fet2/xazoxuvesado.pdfIn PDF document text
    • http://cuiquji.net/d/files/bofisenam.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/penozanar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=as+we+discussed+over+the+phonePDF 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_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 10636 bytes
SHA-256: 86e83aaee27b6cd30611037f3c6f195fd5b59d643b3e6fb93403e63f28ce0603
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 17616 bytes
SHA-256: 590825f6dc3071199ba895086636dfc9ad09583d140fba595b87d3bf92ca73d1
font_02_sfnt_off00011f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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