Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a0c2e690ad9711…

MALICIOUS

PDF

74.7 KB Created: 2021-09-05 23:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 36e0201e744854a80089c014dd06b16d SHA-1: 51b06c6851b0ea1675e5ad31c6d22343c3cd9eb0 SHA-256: 14a0c2e690ad9711f7f077fe786129723cdb99769aecff8ee0ecdeb19de70550
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites, suggesting it's used to distribute further malicious content or phish users. The presence of embedded JavaScript indicates an attempt to execute code within the user's PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • 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=deddy+mulyana+pengantar+ilmu+komunikasi+pdf PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2f4471d6---71490397266.pdfIn PDF document text
    • http://sassyissy.com/survey/userfiles/files/76045891350.pdfIn PDF document text
    • http://polkovnik.su/upload/file/45890382637.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/taperetakixen.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/92285777043.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f2d370a32---xowaruzonopipoliwawupe.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607991c72ec84---sizanupogopek.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/vibiviwoxemotuloxamur.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/wipawaxizazoremubedux.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/93593506929.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021816314239764.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/winulotokuxevigak.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/6c9d0cddae953a2a96e9bec106ff2489/62720809656.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/nedeguserosifabaropi.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/45444904090.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/wikaturixajemuwaturip.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb48b335dac---95225855623.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/xoxizimejunowovitapul.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/rebojenuvivulewuji.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/14523611792.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/47168541861.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/807aa80816e15033ae956fbbc382df5d/53326599397.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/xapowak.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/67239819651.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3920b8aeb---11386833111.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9d456435---47818197336.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_off0000bedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDB 11148 bytes
SHA-256: 274797700c2e6e52389c3040744b3c12f180946c8fbc50f427806d56152aa6b8
font_01_sfnt_off0000d8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 17108 bytes
SHA-256: df0061cac58cb2f65248fd95fcd1d1ff357fcbf0e422dbea416639420529f9df
font_02_sfnt_off00010515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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