Malicious PDF — malware analysis report

Static analysis result for SHA-256 090a6a2175e62c17…

MALICIOUS

PDF

76.2 KB Created: 2021-07-26 12:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 969331b6af6280e87cfdfb7fa31f43f5 SHA-1: ebc4c372ca285cf6166a51f7e3a9180d6cf3d2e3 SHA-256: 090a6a2175e62c17fe4b71e9e8e947b09f99c361c0dfff6a9a868ea1181a006d
124 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous links to external websites, many hosted on compromised WordPress installations. These links are likely intended to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4817

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/82ubkbup1r8ufs1vlbiot1m8fa/44799143750.pdf In PDF document text
    • http://crystal-lamp.ru/uploads/files/14148603922.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d34b2ca88---80196241059.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/1878710659.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/nukejeniwukolese.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2b562f3e2---temutinirunapodojofawa.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/2ec3021c225b51d5f74b9f01e5b2e4f6/jidofidupiletewove.pdfIn PDF document text
    • http://sb-78.ru/files/file/3014114177.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/76096160694.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/4dac32edad3c989473b3c4163e554721/dewebuwaxagizim.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097ebe2c6170---bitazuwupe.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eaf74cb60---50113215037.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa86c9b2c0---63753109782.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084939317bc5---16216039750.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/71160022570.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/61748642107.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/finen.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/74565767040.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d737698b27---18640435105.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a835d1b5995---12583802828.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160720fa35165a---ruxadadafuwiravolasedigub.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/15597937707.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608efef3ed35a---resugisolirifijurepaj.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/45162000948.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/31245357312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=apple+store+cyber+monday+deals+2020PDF link annotation
    • 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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 16292 bytes
SHA-256: ee35a8306ae847c88735138a52152f4a8841170b727af881e90efa512d60b16e
font_02_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 11060 bytes
SHA-256: 2108ee293fac39c8a1a4af210147ced6d52e183af3cd027fe5487398328f4e62