Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e267558debd65…

MALICIOUS

PDF

84.0 KB Created: 2021-07-05 17:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cf160801a78a7052cc98615fa74e091e SHA-1: dff03d42f9f1a6bd3a38823c9702f93d6f458128 SHA-256: b62e267558debd65b20d86094809be455ea9bc7157ed186b31899c32b6fa0493
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The primary URL, 'https://allytemp.ru/uplcv?utm_term=download+minecraft+for+free+in+windows+10', is presented as a download for Minecraft, a common lure for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=download+minecraft+for+free+in+windows+10 PDF link annotation
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e212db46---vujov.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/saxizikuw.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6733c0349---84825759188.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b64a8524ae---99560379208.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082c234028f4---bobibunafikezav.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/sakuzeduk.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/j7qrr4ofu2qil1mhqtc179r8nr/gefamazeku.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805170099d9---bovabazulikowokajujaw.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/libexujupegadivi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608764bb67d73---13704785819.pdfIn PDF document text
    • https://majubesar.com/contents//files/wamasobimapofonor.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/ruribopejiwire.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/52837193826.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/87368275784.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7cb5e680a2191b27342bafc968b88ef0/zatusugomixejesoju.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/adm9j4asb4mtciomp5msp8jlnq/bunefafulanovav.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f3722fe644bdffb532117b6506ee5d82/33058874978.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/u786ul50luvau12ood56c8lvj4/lupuliju.pdfIn PDF document text
    • https://advik.net/userfiles/file/zofiramolirafiwane.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/59262321487.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/woseraxenomotoxewutamuxa.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

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_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 10896 bytes
SHA-256: 9c688bb643c725e12e678d3f55093193f0bebe1a6e4310b605eb67ef47b31bb6
font_01_sfnt_off00010053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 16416 bytes
SHA-256: 46b99c1ec342f26ccfb0cd0144604cbc5424754548ec8ba1fdd1eb5aae8f2d8b

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