Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8c0074dc5f9212…

MALICIOUS

PDF

88.5 KB Created: 2021-09-07 14:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b1ce9e3ab5fe859cfcc57acefd7caa12 SHA-1: 7c73614d6b63a0131a6f9674c7836951cc6d2d28 SHA-256: ed8c0074dc5f9212c97d8e8d572e84406333a01c271d377da451ca2020f63b26
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://lecormier-menuiserie.com/www/upload/files/37320662817.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f96aa1fee0---91948891527.pdfIn PDF document text
    • http://tayles.com/uploaded/33814026191.pdfIn PDF document text
    • http://mousike.it/img_ins/files/rizonobozitadewid.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501155654279118.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/7d99dba63d994f49236039d36e0833bd/dalogos.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6cba0517c6ae8ea134dc893190aa6745/36912854292.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210906145223.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/50424995815.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fceab26daad---88455962541.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/kduork1d63tne0jhem83ov3lu8/65794453376.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/piripokirowifexasegazuked.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/93252224644.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/88518200497.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jetoliwalul.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/wegijukazuviva.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8bf39a32d---nepiwumu.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/volixu.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acddd14af8a---ludivimuxobekojebesamo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083610e53065---siwafu.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/a24d4a00c72505dd0693752892ddc844/dunasebirowodamo.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/sofinodemow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=fujifilm+xt100+manualPDF link annotation
    • 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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 19288 bytes
SHA-256: b6ae3415909d9d3f2c7db326fc0f208e2a8524bec7066b19dd0fab58161ddf53
font_02_sfnt_off00013bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF6 10336 bytes
SHA-256: cccd8cecda0a027e238acfcc4ea1e107b3b4029b95bd5e1c5cffcb2112d80d97

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