Malicious PDF — malware analysis report

Static analysis result for SHA-256 783482da78a7f5c7…

MALICIOUS

PDF

91.0 KB Created: 2021-09-04 16:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 275fd03e9e12f823fb7a16878a3e17fc SHA-1: 09d9956c9b2545fa7d5b4e69c1f2a5fc00049d34 SHA-256: 783482da78a7f5c7f9f7f49922adeec0e90d57af94593294e764ca1cd7a9502c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and link farm heuristics indicates a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://gulf-rope.com/images/bulk_images/files/wuzumaxunazolurojilog.pdf In PDF document text
    • https://autosaloncenter.com/uploads/file/52449845877.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/sadenewifetixutu.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/36599944275.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/def3b068ab5ab0070115f3cff660f15b/7039379239.pdfIn PDF document text
    • https://ms01bet.net/contents//files/rajovisutoxefazimojuveput.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/67602701695.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/tisowolafadikobirulutif.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kevuvisilosusalo.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/66542820173.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a441af4e426---31685037867.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/lozufixepemi.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/00ha8jfu85vve6tfr3nlthnmlp/rewamevogunarozuli.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160820b6b70659---88716058777.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa8da1a67---jexezarime.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/zinojovirisa.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/sunujalogosap.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fe1c606797cf815d694ee4f14432e821/kemuxu.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/25d94c0c369d66efaebbb0defaafae27/86284758595.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f805d7c36---62001722398.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/xosoreranametobike.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0be79e543---numunejofiro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=%C4%91%E1%BB%95i+t%E1%BB%AB+jpg+sang+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB9 10844 bytes
SHA-256: 658fe9a8abe49875dda305c67481d66749341e3a0d0b1b7f9f96c0a7c9b08395
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 25852 bytes
SHA-256: a9189deab067746a4733ca1d23afbb56f5174a154c6ee9878589acfb4923492f
font_02_sfnt_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C06 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_04_sfnt_off0001448b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448B 16520 bytes
SHA-256: 66967de1c7a629b72df565037ab893ec1ab56a63bc2a47594968bfcd44c448a2

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