Malicious PDF — malware analysis report

Static analysis result for SHA-256 12770699de68bab3…

MALICIOUS

PDF

90.7 KB Created: 2021-07-07 10:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0b7aada8e1c36085328ddb0a7ca9f2d5 SHA-1: a61f4053dca88d9017e2831f2c620e72fcdc1769 SHA-256: 12770699de68bab3cd8af681e1df78ed0a694f74b45205c9d448e70854e11b41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b23fa2932ef---rivapoxibuni.pdf In PDF document text
    • https://cleanenergy.mn/uploads/files/nemadinexosifugabemukowe.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/10925163059.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/f7bfeeec1a18afb4b81f9dd8ee5b4e9b/18429574080.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/18441046721.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/69413155040.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/jaxuzugez.pdfIn PDF document text
    • https://sy-tech.eu/file/36355783774.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7eb76811e18acd8e153c7eb764368c7d/50656316093.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/a4cdd9de533e88a8f0cadc1100fac7a8/rizidemepazegudum.pdfIn PDF document text
    • http://artospace.com/pics/file/tabadivida.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/pivabixumeg.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987780b1a0e---94512835450.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/48279034782.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/mowitil.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/95009004994.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/82711300389.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17ccdd01df---kimikadod.pdfIn PDF document text
    • https://agatanorek.com/files/file/turelixisefoxusabup.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/suvawubadivigagag.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/49227mndtu3j4jq4m4ajtn0cq1/nakomamibusofovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=him+and+her+2019+full+moviePDF 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_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 16560 bytes
SHA-256: b10f613d6b146dd1515c097a8f565ac723a39548346640cf52d0121850e1826a
font_01_sfnt_off00012b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 10972 bytes
SHA-256: c2de93624a1a6d007cc0504d94cdc8e824b0d23f6143791171b2d450a14807f5
font_02_sfnt_off0001446e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1