Malicious PDF — malware analysis report

Static analysis result for SHA-256 0132e7425a653563…

MALICIOUS

PDF

103.3 KB Created: 2021-09-04 18:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: efe9f7ee0bc8cf4e29e31e8e36828716 SHA-1: b9936cf9405a39a5b10c25e734b883dc39fd76f1 SHA-256: 0132e7425a65356390e330cafb1f6a289ba4fcbeb5512df07321f4721528e426
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection or further malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=english+collocations+in+use+intermediate+book+with+answers+pdf PDF link annotation
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/66746511787.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/nomijewotevarovogamavil.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/06ncqn84eut6tjqsoevge4en72/3213458484.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d0a2253c17642ab7288f0e3694637bef/rigekazanuxode.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b7068dc8c6d920d8eb55d6975afeb1e9/gelifesijumokup.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/7f2973f7d295d1170beb6afea4b5be1a/2911270380.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/gugavadidu.pdfIn PDF document text
    • http://bcwapparel.com/userfiles/file/wifizaderatawazivu.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/16648689285.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/72430840003.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8246b8b4b69fd135825f7d372cf9b80a/wogax.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb26de3c3---zipozonobazukok.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5af1b74cc---fofugemire.pdfIn PDF document text
    • http://aps-mes.com/files/file/83140825542.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/jaxixadomomusifukobag.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/bugizipuxixosatiraforinob.pdfIn PDF document text
    • http://thaidicattery.com/clients/f/f7/f7b4890cfba443994123e46b8078d6bd/File/79823886476.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/rutudovagit.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/82519939736.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/30877224937.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/tixibafevovapa.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/mujidixidovog.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/pegaketulixaporawirixesez.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_off000129b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B7 19120 bytes
SHA-256: 42c3304ec2d1422dffb0baf7e58c452b0efe1ac479ae4462a300ae574a7e4433
font_01_sfnt_off00015c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C2D 11468 bytes
SHA-256: 7c45f456ea29ff1b97d1bfaab59288ad879d09cc9afb4c6b5000cf68f215206b
font_02_sfnt_off000176bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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