Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80c2b39b2f3dcd5…

MALICIOUS

PDF

110.7 KB Created: 2021-07-05 21:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8360b5b8c59944ebde3a22b77f3de199 SHA-1: 3ab33784a1b051dbb285ed7e8a9749091a978e89 SHA-256: f80c2b39b2f3dcd54499aa497ce1ed52edae3dc0ed9d78e02f51fbe8414c876b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of these link farms and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d607d389e386ac960989d9d2c1330e2a/gajujeve.pdf In PDF document text
    • http://bukharageorgia.com/sites/default/files/file/70916057258.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/72901808029.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/vupej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e31d8e935c0---mapulitopawizororusov.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/buxewonevirefowajuz.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/21832ee7c79ee470cd46d1e6cc6a66e7/75677568931.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/lezewusarolagapuzazijotuw.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/faxebowefepavozu.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/71001012741.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a2c4ef5ce491c0b86908db076fd135c7/94959251028.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607906bf74bf9---gaxepubomujogaw.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/19950994161.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160724facea6e0---91829930438.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2e13f3b2c---75659448777.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/17307643805.pdfIn PDF document text
    • http://giustofiori.it/file/75934366198.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608606ea4304b---simomipi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/f89a73b4128395f01347fdb19d7fa3e8/91542910606.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/leluxoluxekezuzezo.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/96fc02e3ee7cbc39cd0ccd2278ebdf01/65408337764.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/28518b8868100b82332ff26db835bb46/69846281123.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094724d7ca5e---gimejuruneseka.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4ab053790695e3bcce84548664beb011/73877466946.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc75112d55---42330891824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=conjuring+movie+storyPDF 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_off00014c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8E 17996 bytes
SHA-256: b5d1e907a59fcb2064056d136a25444cfb62e5d0ee27bf476ac67ae75a341c4f
font_01_sfnt_off00017bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000193d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193D4 10684 bytes
SHA-256: 31cdcbf6af9c7ad5a4bfafc4f7c5704a4fa3f0b6da22d2b81177c336d12c00d0

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