Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d62e9966b40ed27…

MALICIOUS

PDF

95.2 KB Created: 2021-10-12 15:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2b4388c1f6af757fb490659a257b7a89 SHA-1: 063bb87fce2db18b2c8a8f95f7be0abd02f661c1 SHA-256: 1d62e9966b40ed274e30bd7421fa95c0f32f2cd380082bba7a99512ce655a2c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, indicating a malicious intent to redirect the user to potentially harmful content. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, while the ML classifier and ClamAV detection strongly indicate maliciousness. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://vaynhe.com/upload/files/89145277366.pdf In PDF document text
    • http://full814.com/upload/files/lusojotavosivonesul.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/zutuxubavasozukuvogevapo.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/tixonaguvujilotewexuf.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/morikejiwivejelamuporup.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/bizijumunu.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/49546743943.pdfIn PDF document text
    • http://citlak.com/admin/UserFiles/file/15407795896.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/demabozenulunexamodetu.pdfIn PDF document text
    • http://ranczowdolinie.com/files/riramudavog.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/58083715490.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/40477140767.pdfIn PDF document text
    • http://mylodge-naoshima.com/48418035705.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/sokuvaraveresudanijijefop.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/xoseret.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9e45564f6---gasewabotivabunidaviwe.pdfIn PDF document text
    • http://school15-tyumen.ru/f/44908156540.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/xotinukerakuris.pdfIn PDF document text
    • http://matemotors.com/userfiles/file/wikuzidorigixasufu.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/83654413565.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615712884c6e6---30686072723.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/mulikararinevarujivunopu.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/202192434916895.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/sugujilud.pdfIn PDF document text
    • https://clubharison.com/userfiles/file/9138417376.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/lupufobiwakarofagepufez.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TxADE9PCSUw/uplcv?utm_term=how+to+create+a+pdf+of+an+emailPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 17468 bytes
SHA-256: 2b7310ccd218a29eb0c8751da6165bd5dfc0efa9c9c9ec64cc3710bc71957776
font_02_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10688 bytes
SHA-256: 69b71eb69bfeaf2d4a561784f2aca090ebb1a6fec897ee8006ffebd0d9e48f09
font_03_sfnt_off00013751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13751 21840 bytes
SHA-256: e96243ca4384ae2c0bb06efd5b64fe14f059c6b0295a5984cf0054937c699136

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