Malicious PDF — malware analysis report

Static analysis result for SHA-256 f806f1bbb0724675…

MALICIOUS

PDF

72.1 KB Created: 2021-09-08 07:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b269ac8df076cfe5f4d901513f3069c3 SHA-1: 62ba7e38dfa2bf6a2cf08eeb30548d6e40438245 SHA-256: f806f1bbb072467525e99527f69eb604855558018d3f1b9e0c1a73567e1c07fa
154 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, directing users to various URLs hosted on compromised CMS uploads and disposable domains. The embedded URLs suggest an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6686

Heuristics 5

  • 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
  • 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://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736f7674972---64194808507.pdf In PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/rekobomuwezezojavu.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff76c8722---29674746320.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/44786711694.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/26749341967.pdfIn PDF document text
    • https://brod-plovdiv.com/images/jajuvobarilarebunoze.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16106c39cdf53e---13357065143.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d7658b70581bdc47924a32a94112b763/49785132339.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868c390c15b---vukererag.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/rubir.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210731051432.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/58552315129.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/61358567589.pdfIn PDF document text
    • http://sdes.in/uploads/movul.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5af8e89257a735b9b17d732229eeaf82/penexesudam.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/86315f9ea7f0720343dbf08fbc4a563d/gazerawixa.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d76b6529---81047765510.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/36984118204.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071abff77e4c---nenugilalori.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/dea2de196b855dd35f22b36a77903d42/70283598235.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1625745442.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/44081113236.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/91601195475.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/q9nqm5v0eluajq7d5mbljhoc03/fanadivozodina.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/dovas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sistemas+energeticos+aerobico+y+anaerobico+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 11244 bytes
SHA-256: 77c063ef12f1504dd3d8a14e6fba54695a9dd781fe680d05ef17a0af45dc3329

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