Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7ce993a49619f4…

MALICIOUS

PDF

76.3 KB Created: 2021-08-07 11:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 16fd835c4b2b09f0b811f76f66fd0b10 SHA-1: a67b457d26ec3a5f094e5f9fdd9d6ca2c51419fd SHA-256: ed7ce993a49619f4c2fd79da83731f834e34d5c2317766d2bd2f808d7a331598
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS upload storage. ClamAV detected this file as a phishing trojan, indicating a malicious intent to lure users to potentially harmful websites. The presence of numerous links and the compromised hosting suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

Heuristics 5

  • 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.
  • 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 https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/furapf8s76hur4qjdo8svqrs8a/45449399957.pdf In PDF document text
    • https://hotelindigha.com/FCKeditor/file/gusexijudipole.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/walofeti.pdfIn PDF document text
    • http://www.bandungmesin.com/file/rexexasuwibexalepe.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/zisonuwoneporupikeb.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/db9203395b75979def95734d0430d14d/39928707581.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d91f9b41515---juguvizavitu.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/94178843306.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/gawekulovowafores.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1610d54c5b2cb8---tesibigurijirudajozuxore.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/45288816668.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbce99a50a---tavejimubekuzelu.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/sojuvuzovujepudozebiz.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/nuxunerenunisuriz.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/15151110433.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/f6ac75d7335b083489e215e1376897ce/15730373128.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/bijomofesisove.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/suresabapamufewamod.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/tegovakenakuj.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/sejavirovegisod.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/41894351222.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/sexejejubepu.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acb9376f1---kotuwiwomixabezonalu.pdfIn PDF document text
    • https://botroul.be/uploads/vivix.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/760uu1b5fhf8cgmlh0m4aitugf/gisurom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=el+diario+del+chavo+del+8+libro+completoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD465 20036 bytes
SHA-256: 1fd341637bd922c1606c87b029b16dd6efb8af2d01ca3377a5a9dc48d47cd146
font_01_sfnt_off000106ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 10904 bytes
SHA-256: cec49cd5fda6e2da605d2d0f5718887bb748f824efc6e96d916c27661bc99127