Malicious PDF — malware analysis report

Static analysis result for SHA-256 52002ae5a4ac87e5…

MALICIOUS

PDF

88.8 KB Created: 2021-06-25 17:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 32dfcd7e861eb09b4f7dbb794bc695a8 SHA-1: d5e0bdfd57c7fdc59c564dcd0435d86fb6ba4f0b SHA-256: 52002ae5a4ac87e5a23116f90f31b332ecb37f03eb82d31558c155bbd748ff48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm hosted on compromised WordPress sites, designed to lure users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=my+town+haunted+house+free+download PDF link annotation
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740a524b555---vixofujolizab.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/dujorafuzabivizixomuniwul.pdfIn PDF document text
    • http://meta-min.com/files/lizupowefijusawuv.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/63374042612.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/831faee274517d924a07aff93bc45c3c/vamedugaserumezawosuk.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/f53593fa87dd2f0d465ecc9ce91de675/44350772491.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9108c219f43c6c945f23727f5801f7bb/xafemugin.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///wixegokoz.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/158f93d7ab5c5ba555a59b8e3b733f87/lotajukenawoperixalodoloj.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f425aba49de0ca429f4df9e30757fd94/35315114079.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d21aa4c8c7---13461299829.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/204758e9a1f48b48af27e20c04991816/54549744329.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9fd9e77b---89886171836.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zugelanekipame.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdcb8cbbf7---29016991896.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecdb2a00e6---zemopujulabezanitigis.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/rowekip.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089f69187257---woxovoneb.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/2507171173.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19dbe225fc---puvan.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d61ff952331eac2b1b6e6c9689becfa2/415778687.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/63891161155.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/rutuxaxufupojodosijabib.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9ed9673f---zulixisakogev.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/76197321537.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_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 17180 bytes
SHA-256: 9d14511aea5fc50f56086abe8ab4eccf98bf8bb577707984212508350b5826a2
font_02_sfnt_off00013d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D48 10652 bytes
SHA-256: 739ff7e12d4c8811b3370d9b663a9e8d19bb5fa7e33fbc858474680ad4e29a49

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