Malicious PDF — malware analysis report

Static analysis result for SHA-256 51148929d0318af0…

MALICIOUS

PDF

84.7 KB Created: 2021-08-14 01:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f834cbd0b112d888c14f58d79acad404 SHA-1: c6c88121e12e04bb7f66dbc9379eb52b237fbe79 SHA-256: 51148929d0318af02bb5295a5181151b2466b164b0bf03655e4519e94f619d0d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive, which is then expected to be opened with a provided password, a common tactic to bypass gateway security. The ML classifier strongly flags this PDF as malicious, and ClamAV confirms detection as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://tndgdemo2.com/ckfinder/userfiles/files/nujoriromilupurojure.pdf In PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756c0461272---68518343089.pdfIn PDF document text
    • https://marosme.ro/hirek/file/nonowolad.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/3469915566.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/57323504245.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/fisuwosag.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/kodapav.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/welepubele.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/mufolimajojabubovawo.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6326a9a645c2bb8086a96c2134584cec/83275292442.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160925c4b5da7f---18266298445.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/41510226489.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5925d4a77---jaxokujizefo.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/simixunaperoreletebofa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607752be51051---59044495026.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7a5f2e10---50184775732.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/1ca5e7f025931c8da797e94817d53c66/maxiniri.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/62242492282.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb7111d89---86596493411.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb71a40aa6f---14852401701.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ef0ae573ac28cbedd91d862399f50b81/debezofovuwewuxek.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160903aa801a5f---29559294180.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/17126914859.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/xujuxupexozewexamolilek.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/33779307281.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf08a1138---jifufodolaxijobewok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=autotune+evo+vst+macPDF 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_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 10300 bytes
SHA-256: 3e295e825595f40bbf99eb1811d035a82a8874fecf98ed085f510af0c16ad1af
font_01_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 16672 bytes
SHA-256: 0de36587ef45828c754a38689e9be695644e9e57ceacaaf2e584128be28542f5

Open this report in the interactive analyzer, or submit your own file for analysis.