Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc60f6afc4ae2061…

MALICIOUS

PDF

72.0 KB Created: 2021-09-05 17:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e6196d8c4370eecdf8e0c11b92bd6b83 SHA-1: 72f8d96d1ff2f8fa940dbb150bfaece79f9c075a SHA-256: bc60f6afc4ae206178792617d102b6d177f147ba61da29a272200712477d84c5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://garglob.ru/uplcv?utm_term=english+grammar+noun+worksheet+for+grade+2 PDF link annotation
    • https://bioesteticaonline.it/file/semexoj.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/jakuxobukazojuworiwoj.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/6nlkg8km93k3a54f37mkvheb53/64477756905.pdfIn PDF document text
    • https://red-adlay.com/upload/files/72114196165.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/bupizatopitas.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/kopunasezejeligavijirodi.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/vevuvuxisuzozad.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210705112526_er66d4.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/dufuferubuvugafolujoz.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/vuv2ti9dg54ino0poms4solv0j/bifiliroxapudozarazoresew.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/fiwofofagita.pdfIn PDF document text
    • http://erictex.com/ufiles/files/sisikonisexumudajemapasup.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/37099453177.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e33aaa1d544---92220333221.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d86ef626040f00c2b772d5bdc724acd9/xodafidu.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/mowaradobaguzogelaka.pdfIn PDF document text
    • http://firegallery.ru/img/upload/disogutidovij.pdfIn PDF document text
    • http://becucci.it/userfiles/files/gokaberuta.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/tozewarisalu.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/renelavo.pdfIn PDF document text
    • https://aashianarealty.com/file/64186405632.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/zamabozo.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/91852932790.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/59930880024.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/78722814030.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/3encknhlq0nb864tcne0a47k87/92473477883.pdfIn PDF document text
    • 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_off0000b7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F5 15324 bytes
SHA-256: 292252fea34194c37acba26d08e8be29f48a0520731909ba006e4ddfe0a2126e
font_01_sfnt_off0000de5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 11180 bytes
SHA-256: b09b330208dfa4e8b671be48cc7459aa77d387b39605c7688b88951ee831f367
font_02_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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