Malicious PDF — malware analysis report

Static analysis result for SHA-256 95279eac3be42592…

MALICIOUS

PDF

82.1 KB Created: 2021-08-06 19:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d197a8b3bf985794bb782edf64d20462 SHA-1: 7a99ee40cb6b28c401ca8de15c1fcef9976c3961 SHA-256: 95279eac3be42592858b3ecc86e54b8894ca5bcf4e9fc5d0fcfc9039af9ce79b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://visualarchive.bg/files/85201372824.pdf In PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609065448da25---87902207255.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/60794720671.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/32651717933.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae1882160---sasolofazedowuxujife.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/vofavuwapedilovatodek.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/faraxozapu.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc892877d4---ravetejikux.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb01a39026---15021576664.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/56onk6uhkllduljs26a93t7pnd/59332394688.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///mubog.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210803042810.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/gerivefejodabigi.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d564148552---33046213731.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/sifafovasoxaboze.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/8650824747.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08ff68d152---2332217826.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/keselu.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/wigugitiredolak.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/42620834562.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=oxford+phonics+world+level+1+teacher%27s+book+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/796636a2665bf4de3de0f8633c6b3715/lofepawo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 11316 bytes
SHA-256: e3ba451e8e0edde9556f2018d29c27103e6a863f1b959e94fde4be114cde5fa4
font_01_sfnt_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 16436 bytes
SHA-256: a0fe778fdbb9180b2c0ab5e97ab0e2b0e479ed942ff57a90a807286eee462aa4
font_02_sfnt_off0001069c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069C 8052 bytes
SHA-256: 2a100f54b522bb0a6818cfa43a0248db6908f8c3b22e16b11e7cbac9e9f83c32
font_03_sfnt_off000121ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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