Malicious PDF — malware analysis report

Static analysis result for SHA-256 455fd82804eb71aa…

MALICIOUS

PDF

88.8 KB Created: 2021-09-01 03:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a3e647ac03aee4338df2eb06e150acb5 SHA-1: 18947efe1d12838c6382fd5cb698755a30967671 SHA-256: 455fd82804eb71aa27c65693726a2889d13b0ed6bda39d12a74418af861812ea
154 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many hosted on compromised CMS platforms, which likely serve as a link farm to distribute further malware. The document body is unreadable, but the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5983

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://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/18522341181.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bc93ed29079---35285897128.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/25dbb690cddd062163684dab82ae304e/23813459949.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070377ac0cf1---warebid.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cc0f67467---397070071.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/lebado.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/32341219566.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/6523028783.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/sunifenaxuzinedabukijada.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/a689fff91651228782e07d243cf12aa0/putopazi.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161254ff52951c---dikurodorane.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/41311517324.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/reginabipamivademotatope.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/laolg67hqu6rfm43o5i27qljn8/84513795178.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c291933fca---xitiketizanetepo.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tmdsh6u9msm93fgdhuf1qkhnav/53423121216.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/piviwam.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/85311039445.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd0d74121---5213032232.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/992979544.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/jalol.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/c0a7e1014889d11c71ad0c710cf357c5/82651679113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=i+made+a+promise+to+godPDF 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_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 10536 bytes
SHA-256: efa1149c19602303aab32db5eabea0318f53283368a18b932014565137659439
font_01_sfnt_off00012be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE3 22588 bytes
SHA-256: e07b8ec16a6c3a5a825fc05caac4539609d65b3b982b70100987a85bd3843ef6