Malicious PDF — malware analysis report

Static analysis result for SHA-256 f229004cebefe71f…

MALICIOUS

PDF

86.1 KB Created: 2021-07-15 19:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c2bb1f925737ecb16ee3990ac78dfba2 SHA-1: da29faa2a9dd2823edd00a41e96e4e5592ae3507 SHA-256: f229004cebefe71fefa3c0e407a61dd5f7b2a894a662bbacc98932f036f680e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host phishing content or further malware. The presence of numerous distinct hosts and the use of compromised CMS upload storage suggest a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a2b44f89cfd---80924861035.pdf In PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/8f19f91f03cc58b5611f1722e6385454/92528964218.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae6neuh4chnn18s7tnc097iqpl/71259624300.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3d7107fea47d1a238a18fe295a953797/lafirebovefotofawinepi.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608752ae97de8---93095562116.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/hap3ro94fs022fgre0uijrmofi/73060439241.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/tuvodisulupi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd71893e5---mumezadetenezasomujisojo.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/wexinevonasoburuzedabular.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rdqikg67k1cdglp32lsvoiu3od/6276202028.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/pezopabiwotizo.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160755cd9d60b1---54435219660.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/79103333112.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/58754207319.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801a71b8aaf---36775786468.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/jagerebuvuvepuruk.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/69243577737.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a57cba92391---ribozixebibi.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/jivovizovovo.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/8141910829.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbffeb4388---78205500955.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/50947422494.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d221e5890---56467922188.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/334daae5feebf3b1130352f4c0407c2e/35525580918.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/40fc22c157333aab7944ba331c159631/84726859755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+stop+a+manual+car+at+traffic+lightsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10972 bytes
SHA-256: 76ee822fc364d0ca2aeb02ec11e152bb90d4be8316dba159c9086042b73d6838
font_02_sfnt_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 16912 bytes
SHA-256: bc4c3444ede4c5373595271dce8318deb30b4e53cd00715a47841b1c44cdeb75