Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2144e7d02aaf22…

MALICIOUS

PDF

88.5 KB Created: 2021-08-11 08:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 67293b2e47cb6bf10727c90fa879b3a9 SHA-1: e32e6781d4d586088cdaab246f070826008148cc SHA-256: ed2144e7d02aaf227916bc6c86d41be534168a8b4a53d8c8eccba1da435031e8
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=pelicula+de+baile+urbano+conpleta PDF link annotation
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ba648d81---legapebosabej.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/parubozewi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9061ae3e---14584741504.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071d240450af---bonoguxive.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/51d84f01b61024844177ac95a9af9174/32783613652.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/jurodosijogupe.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c181e6a0944---sokokukasak.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/dimatape.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34e764b4cb---luxarojidilakomadiz.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/16280560762.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1611312e303978---gijepaputenemibu.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/nogopurawuboparej.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/tilapodojevojujif.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/lupud.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/wejeresovodatafitudusupud.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/junutivanapu.pdfIn PDF document text
    • http://dongxuyen.org/upload/files/pifilasevapelivetef.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/marebizo.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/jorodupixeja.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebbf97f9c7---94112931538.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21ee9ee57---pabaxevugoligurozul.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8958151790---pukida.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210716154253605974k7f5m.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_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 10580 bytes
SHA-256: 221c0d913acab801ee64048308e9cdfa3bd8885d44810c9c8c5d0891f815db71
font_01_sfnt_off00010ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 18600 bytes
SHA-256: 57f9685e085610d2068a214611764a03c4013c966909da8f2d25b9e41e7c25f5
font_02_sfnt_off00013b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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