Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aeeb193c8c26723…

MALICIOUS

PDF

97.4 KB Created: 2021-08-09 20:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 51c95222a76cf3e18bd8942932a9c2f4 SHA-1: 03449d0899de20f611ce15b85a474a87ad7d4c54 SHA-256: 6aeeb193c8c267231dc55bb73ff340fa4bbfb1fc67bb1d255a32d267b9ac1cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://garglob.ru/uplcv?utm_term=farming+sim+18+apk PDF link annotation
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/94c7ebe99cfc17d168eae762704fb5fd/barabarelametelijipap.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/19672977016.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110b522d0c09---6280477989.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/93491190415.pdfIn PDF document text
    • http://cjatkinson.com/userimages/74912964754.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c333cbdb22a---89393300466.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/gufedozigerajijagew.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/69763909524.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d7355e964---10222992169.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/81384132565.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/raretakokanupitodojupapo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/vula7pr9lav89plvqam88va8qa/gefafoxezofebiwu.pdfIn PDF document text
    • http://mlight.cz/archiv/file/86503209094.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/xiwupawo.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/73448827089.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/laxiruluped.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/mokolevalerujefuluta.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/tmvdetn09ot14bksua2ol6tm4a/31643310165.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/93493673126.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607e70df718a7---46091512403.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1120dd4d0739a794dd7e76e94df78165/below.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/roralefuj.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e618ac66b48ee97102aa66bd19794098/tazikifaninemeruvoj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 10528 bytes
SHA-256: b21841a4f97eb04aa2ea9f962d160e4f1c82cf6c9304a114cae8aacc271f251e
font_01_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 18000 bytes
SHA-256: 2c0cc1ab92bbfc5bf311dbe915cde8e781241bef5e4edd49596c0d955c4d23c3
font_02_sfnt_off0001566c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E79 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a

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