Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30411156aedc006…

MALICIOUS

PDF

81.6 KB Created: 2021-09-04 21:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 205212cb40cd33bbc1df08d6cbbd7139 SHA-1: 0d70a69074d8f51d6f960c4943f307955c5207a4 SHA-256: a30411156aedc006e81bf091c57c0afa1c67487445cf82945cd51947bb58252a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://maility.pl/_ADRESuserfiles/file/tegupevofavibiwitatoraxol.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/kt29d8are07jlree44sh59jib3/luneviligabovupa.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0d608f37f---fozonezokefilorifelobo.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/95772933196.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/rijufobem.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c4834115cdc---wijefud.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/62366270914.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/91063149170.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/kukasadupemagunokidovumob.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16214436071803.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/feviforipisamukik.pdfIn PDF document text
    • http://atek-ent.com/upload/file/vogoratijevexi.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/80038002039.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bf6feqm201rji4fp42c830ptm/xidepazexugozujobedaf.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/25787708740.pdfIn PDF document text
    • http://showdoimovel.com/files/files/pukaxenovisogufizagafufa.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa717e1ec---wifoma.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc1b464a29---3011523294.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/8918021013.pdfIn PDF document text
    • http://scpt.it/userfiles/files/dusoluzasu.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/98534181130.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/60509236106.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8q0le13b4k6mmj84o27oveiv05/visudodonazobanevabej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=major+problems+in+american+history+volume+1+2nd+edition+pdfPDF 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_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 16504 bytes
SHA-256: 7f8731d64efa24579ecbe5ce08b82388bd5f8d9e94d09d9705dc726f0ddbc66f
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 11600 bytes
SHA-256: e33337bae664cf36b8e91583ef77ed05604727c4c83afa0afa01475b6007829a
font_02_sfnt_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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