Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e468d456de3eca4…

MALICIOUS

PDF

76.2 KB Created: 2021-09-23 18:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a0c8e2565394dafe2f87757227aa84b SHA-1: e819800a89b2c11a7acd466053746f72c2a71598 SHA-256: 1e468d456de3eca4bf774e37d40fd9a983f6f11b1e06fc8639fd8afd851bcf2b
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple compromised WordPress upload locations and disposable hosting sites. The embedded URLs suggest an attempt to lure users to download potentially malicious content, such as the 'apk call of duty black ops 4' referenced in one URL.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132927cb8116---joketifokakod.pdf In PDF document text
    • https://www.karelo.com/uploads/File/94111405783.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109171549546551.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/sotasamibapixomolu.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/89307544702.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/xawodogemigunopipoxukolar.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/ronaxowukaverasi.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/99417361881.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/lisokokumezamopejawi.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/rarixosiditavifawujowem.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/93269269271.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/fedejimeluvazizidise.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/busowulufejatukasutugode.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137978994dcc---xaronavuxiw.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/37e29b84ed749958192ab77445d436db/59243558993.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/xoroxejawopaxebezote.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/32411237380.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130628410b17---bupiwabe.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/junusebizuvixifixusipar.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/mobuzozesakelezeji.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/33453821680.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/fogirusafed.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/wikinelexirudavowem.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/rizepuxujenafupapod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=apk+call+of+duty+black+ops+4PDF 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_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 18000 bytes
SHA-256: 0ade46171c9888e6a323e76027f4ccfecd1571ac1d7f0b91817f0fe1b0a939fa
font_01_sfnt_off0001112f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112F 10688 bytes
SHA-256: d87e9d7a5e5fbd96ac07d9feeee21eb9c54f0b181f1ab24755b3ec3305b425d6