Malicious PDF — malware analysis report

Static analysis result for SHA-256 300ae34127e67cba…

MALICIOUS

PDF

114.9 KB Created: 2021-09-01 19:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eaea047924ba9d542672b86b11dc551a SHA-1: b935a8fb10992acf82b5ac710f518f2668e92264 SHA-256: 300ae34127e67cba9e0fa2e81ada0590a224e9605dcc87520781571be68e26f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=side+effects+of+phenobarbital+in+babies PDF link annotation
    • http://extracam.es/app/webroot/arxius/file/wafedovafapojanagotakoze.pdfIn PDF document text
    • http://eternaseguros.net/files/files/2435791127.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0f51c950---38624379081.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/jenodevotixepitewob.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/78939010026.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/cbffaacb256c3a1df8188e286904ec28/kigudewesakigu.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161047be598cbb---48910102358.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/kakoze.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/fepewanupajubugewite.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/pajakakojux.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161040625dcc30---xetozalupijotojuziweki.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/95494470443.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a42cefc33aa---22625412000.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/8013573302.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608341e6bca66---xegefejasunanonuba.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/15367192664.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/95326525878.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607783beddd90---95866962628.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/90762700681.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d1c7123c---gibuxazozosuduvidex.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f8ee94ef---62619958695.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac46afa92---zupafiribajixinosesobowit.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f252a6ad5c9c4db240a8ed63691ebf4b/zirafumaxovusetaxa.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_off00015688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15688 19944 bytes
SHA-256: 56f146ee9728a8f75bc47ebbe7e3c0411d10ba04751b4a86ef758351fd8616f0
font_01_sfnt_off00018b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B6F 10932 bytes
SHA-256: 2ae58953750f98026909d05bc720f827d715f60ccbc22b8d18d21cc0066da2ef
font_02_sfnt_off0001a472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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