Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e8eea1a8b16b5d…

MALICIOUS

PDF

85.6 KB Created: 2021-09-01 07:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a30e80c79309b64cd197ec3798412ae8 SHA-1: f1eef896e9bf17fde96acca5022e9aa39220da62 SHA-256: e0e8eea1a8b16b5d7b3ff4e9d412be85d4ee19b507979883020a30f17779ced8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns are consistent with malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=the+girl+on+the+train+megan+hipwell PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/01d23025b933a9ff1f7aaf3af19d5155/jajeroxomeromejewof.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/69vau6kfmfp79268h9lq8cs497/73827484304.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab96dae4ab---55843505802.pdfIn PDF document text
    • http://davisnewfoundlandfamilyreunion.com/clients/60627/File/88622477446.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210826181536594.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/94aa62bea770d93978d10e001e4475f4/nebupigavupevadarefove.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/raxiberadatun.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bacd5326e---vijisuzoli.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/85670393251.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/pawenizurapexa.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cde94a78---lelidepivadazomogud.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/binuzoxuki.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/fa9307qtpsg5c81792oip2t870/10063503216.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/wevosazuligubotigetitiwu.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/47991581983.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/31982718480.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/e07d9ee4aa43e170abb7dcb05b561d29/30294456980.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/duwawafasalamikusivuxo.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/64167836816.pdfIn PDF document text
    • http://klaaswester.nl/img/file/40335031725.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/86991428622.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021061603481280.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/gai988pudgeqa4nkdot3u4ol77/42057162094.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/c9403b3f27ab24a34b200c244f6048a3/13842908672.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 17524 bytes
SHA-256: 087d2b8be4ac79c606ccd80e3f404dc759acaea08f7f265cafc2ea1ab0db15bc
font_01_sfnt_off000118b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CE 10580 bytes
SHA-256: 2a5f8f7859719c788f14b43175a6865de5b5e0df8bd4699835c3a31e9b469066

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