Malicious PDF — malware analysis report

Static analysis result for SHA-256 5062a5fd581b529b…

MALICIOUS

PDF

73.3 KB Created: 2021-08-09 07:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df656e7cf07ea3e1de67d7a08378c054 SHA-1: b91658686b96e14a260e532c6afa5ed61e5ca738 SHA-256: 5062a5fd581b529b921c7e6592db0532a1557429c30c0844c62dddbe999539f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://smidgel.ru/uplcv?utm_term=samson+concert+77+manual PDF link annotation
    • http://aliglobshop.com/userfiles/file/geponuxoxo.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/sedexujumodoranakifo.pdfIn PDF document text
    • http://brenderup.ro/mm/file/tugerisodosope.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/2252198199.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/146576e47knmclqc139n6ai72l/84922751999.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c1b9013575e8bcfad8cbfb22ecd86191/vutakewavufuvizogi.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/1965417412.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/47a50f2b5bfdc55bbf3410263049851a/telinaxitazofo.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/72449190145.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/43985664270.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/t191qle4329av1n7jtitt814h3/21577776291.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/98131924091.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/71ksqeknjjnf2crdifs56tm2b8/71323189400.pdfIn PDF document text
    • http://flirdining.com/uploads/files/kipesewuvuwovipugaregu.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/xoxamozopikoletefos.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/tovubesodituxosa.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161061e5623a5b---72333695423.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/kofewuz.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a4ea109def8f2582b27ca114eb210e03/85374211961.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acedb63e294---80724733796.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/aeqjaoos3q1062rdg88bedm5e0/zoriminopalagojakonep.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e05020299d2---10499316969.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/82531429681.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/62672894842.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_off0000bbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 16732 bytes
SHA-256: 3185ca92db55c9b02bf2132928401ad022a8215095e1e96e403942d5f2fd4ef0
font_01_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 10524 bytes
SHA-256: b0613d81bdc7cdb27680b088430b1ce5066d7cb330491e465d7c24cea9f3cf52
font_02_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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