Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b77687eeadfe91…

MALICIOUS

PDF

79.1 KB Created: 2021-07-17 17:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3823bc7b642ec693c230c940a1f7366 SHA-1: a16012849dd8eb6af90fd8687675dc9ee355e73c SHA-256: d6b77687eeadfe91a6728c459dfe82ca586e87f5fa64ff0a45cf9edbd4d24570
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. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/50424264851.pdf In PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/fofegobaremiz.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/27226833029.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fvglbaftrsa5o58v0qquj577nn/jifubimodegozitogaduf.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210703182515171.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/16968103891.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/dopamozonesukavigakixo.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/krg8htcs203opv6hopdqhagt38/5488819616.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/4bifdi1e9jd1m6bevk54ettdsa/53101420667.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/2cd249e4fc3b463950f5c980c1aab05c/koxamijozukom.pdfIn PDF document text
    • http://mousike.it/img_ins/files/45301361142.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/23423073778.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/46fa9a937178ef7c934a08d2585d34ae/31268088160.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e213218741---zigirepekidifuzuvifepoded.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7anjpiq9td36ckrdgav0afjht1/37029888741.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/78881263640.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder//userfiles/files/figajepidaforegas.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072aff1ed352---87457271474.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cacfadebe---93391802282.pdfIn PDF document text
    • http://poorclarescork.ie/images/tapimapoku.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ed577a22b---57352535344.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/suwezugobevaxa.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7793cbd1fc---97445838447.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/suvupolitemivofovojanirub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=two+puppies+from+the+same+litterPDF 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_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 17012 bytes
SHA-256: dbccc3f5fb9062b7f459d3abc6139e18fbd0bb0553b62b720ae334d89c02fad8
font_01_sfnt_off00011d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 10668 bytes
SHA-256: e1d3116f3676c79e7e21907ab04580b93f33ece1353695e708dc2bff809c8008