Malicious PDF — malware analysis report

Static analysis result for SHA-256 56019ac104d17d59…

MALICIOUS

PDF

95.7 KB Created: 2021-09-08 09:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f19fe7de86d751d97756c3f187f46ac4 SHA-1: 76c17ba245bc917c059068fee5fb300f765b07bb SHA-256: 56019ac104d17d594a3bd3ef7b582d72f51f46b14079797a45803b1209434cf2
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://kelkenaghshband.com/app/webroot/img/files/70432235236.pdf In PDF document text
    • http://hbisan.com/userfiles/file/wodaxodiku.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2136a1671---rapobivuxeso.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/lopedinajoguvixazipetij.pdfIn PDF document text
    • http://darienhighschool1961.com/clients/6/6a/6a5b14ca9cca6c9c7811e238b5dc87af/File/pujanesezuxoluwozaxupi.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/janofomiroxofog.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/27275267153.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/56819381542.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/giberatumu.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/f1cf6d80a190ca2133026740b81b0eb7/pepewibasabuz.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e238dd2c201525fa6646a5c98e818139/piserepakapu.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/jiloluje.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/429bab634dd20b0d04d6836f83aebc88/66751106294.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210811201144.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/95730544830.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4243dda7ab157a031d65f894635b5574/15265400496.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1iuimgrld6pr9uq2kovsj7pp07/towiku.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/69937163291.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ae8614742---tanigajikagelapazuki.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/89454518739.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bqd0lalq2ij1t1r5c6q03vo42b/mumogaluvemivuja.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/42664562551.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/jufavexoleweludujatavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=interview+question+and+answer+pdf+downloadPDF 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_off00011001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 10840 bytes
SHA-256: 30b54e6d326d2de9c2b8db0ded11081b67ef691f82cf8071997335e781ffc63f
font_02_sfnt_off00014110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 18408 bytes
SHA-256: 0dc5628f9750b0dca7f40c471ea9386fcb92f3942e38a41f4a4e9337e0adccb8

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