Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c2ab6fa9878077…

MALICIOUS

PDF

103.5 KB Created: 2021-06-28 11:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7f32eced36dc3f35d0d4c917462cd102 SHA-1: c0fad4ac0ffdc1cbb5332ed671365900a6afaba9 SHA-256: 40c2ab6fa9878077c88f569ebb2942eac2c5460d82b2509a004707b175802326
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

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 http://travellightnepal.com/userfiles/file/52373550612.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc5d5b53f---lidazupaluzisiganopamim.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/88106196849.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/puburaledam.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/vutosupebufofesimazori.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/jodejawuwi.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ik13cgqru6hi459dind4emc5q1/lutovarijububapewefibu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/bisofegatowanodewebodagat.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/61499118784.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083828694aca---vonupujuk.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/7975865054.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/mudolusaluxijiragatobuf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b941e8e779d---18529907337.pdfIn PDF document text
    • http://candientushinko.com/images/file/57115008754.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087d07904b5f---bubibilugoriteraxo.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/48894804675.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/binikelajivudujixupurawo.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f46ae0c6e---vetanebilirovovedafuvev.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a35f11d5---40707578733.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3b3ca0021---jeluriwejulivujele.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d06efb126b6b4a6e36a45db9a8903591/naresukovujilujal.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1866e28b8---vafux.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b82a7e8d02aa324ff477d64d8400ce08/nuliwebato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hcg+phase+1+foodsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BE 10504 bytes
SHA-256: 858dd04d1af1edb89ff5092b5233757c47c66316383d00a915239218c198bf14
font_01_sfnt_off0001499c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1499C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000161ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AE 17584 bytes
SHA-256: 8b90d85f831d3b9026e871db317b97a000341baa69a03a9428affff63544ad5b

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