Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ff15629b16f223…

MALICIOUS

PDF

95.7 KB Created: 2021-07-28 03:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2db4a142e9a4bb0fdda074bd2d3d8ce7 SHA-1: f4d712bb0e5582843e2586975cb103d6179b37da SHA-256: 14ff15629b16f22378f4286f6ddee4c2d4423d4a9ec8ca61ef18a513c6a5910b
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, many hosted on compromised WordPress sites or disposable domains. The embedded URLs suggest an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://betenenergy.com/sites/default/files/file/29957860356.pdf In PDF document text
    • http://ajivikafinance.com/userfiles/file/wosexo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606e85b9c0f10---63929764156.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021061808575536.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1eaba51a0---sofejulanirevadojagonupad.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nupikirofepatumironul.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/dugesobeg.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/22065741478.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/77742920013.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7869967c5f---jiromixirawusolewo.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c27d7032b6b---35005895776.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/12344313907.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/53802551825.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/e9f876d59e4a78d681e00726e5b1dd3f/pifadaxixo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/74f9105c97f593dadfee32c242688bec/lemexivop.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xumemogebomuseweme.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/1372455746.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5533715a0---petuso.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/6cc0e57b6b4be256ed4b3f1f1904ceda/89793193007.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae22b318deb---5512752003.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088161a8ca26---41214788714.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99f81f2208---kudaxawiwilobevif.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/xarovuzoditarapitonusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bay+yanl%C4%B1%C5%9F+ah+kalbim+mp3+indirPDF 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_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 11000 bytes
SHA-256: be7afd8e40b494fc03bbed11cd31aebc3bb030f849f80941a7890968224fd656
font_01_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 21596 bytes
SHA-256: eb0c35af5c97bb4e5eba033b7cc596647109f00608426debd80397118bb3b114
font_02_sfnt_off0001306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306A 22540 bytes
SHA-256: b5fa327a428b9ff35aea3521583f0286e3f5a5a6fb7fb9681f98a97be6734f5e
font_03_sfnt_off0001565e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1565E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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