Malicious PDF — malware analysis report

Static analysis result for SHA-256 af21b50a0a3e6ede…

MALICIOUS

PDF

80.1 KB Created: 2021-08-19 00:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6363475f498ca5a04e448f5b040d8deb SHA-1: 3045d288d0c14c069e1d56b4c8b45f2d73a57296 SHA-256: af21b50a0a3e6ede0dbb937a5bd78b33d38bc290627df5a34a1b933e1a2caaec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress upload directories. This suggests the document is designed to host or redirect to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anm-av.de/uploads/files/55458084199.pdf In PDF document text
    • http://agro-vostok.ru/userfiles/file/39337987344.pdfIn PDF document text
    • http://krossinkeuka.org/clients/c/c6/c64aa726effa6776341672ea469011e7/File/43476877838.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6cad05a932176aecb55bb856ed393b80/88836948489.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a615b353---gufududaxepilotugazogok.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/594a614c2bda4fb71954be4c1c0869b7/kuvorizil.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/24133423687.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac07bf0cca3---16173380862.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e154aae7e---84125994088.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/xazigovefiv.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/2789026806.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/jipeva.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608023493aa53---tujiwemusow.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/7b3mosb2mv94sqb1s8tv87r1e4/35067057866.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/59d81db8ce8d2eaa41837c94d94a453f/pimimajeme.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-3/20210503171631996196.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/zofapevofarukuj.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/302bdec85716efea957c2cfaeeaedf71/60844093476.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a4cbf3817---80376934296.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/14597681567.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/742274304.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/96629807713.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/taxubotafik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mclane+edger+engine+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 10420 bytes
SHA-256: 155e7a84a2c01748a540dd1b9f3c7a569b8454e4f564def3609f7dfbbc3d3c5d
font_02_sfnt_off00010530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 17260 bytes
SHA-256: 85cf0cb653cadee8b3d30b220a074763a8676dc9c5dc250e5d8b9ab96ebae646

Open this report in the interactive analyzer, or submit your own file for analysis.