Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7197a9a603709c7…

MALICIOUS

PDF

86.4 KB Created: 2021-09-02 00:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2a091e5e49af07aac1eeaf547fa7ae2e SHA-1: 4a601253515d6d8816415061b9b83d4f6bcb6164 SHA-256: f7197a9a603709c7a88c55272d3b2d27552bdda34b70f4292caf2b52edf7f926
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware. No scripts were extracted, but the structure suggests a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zit-tech.com/userfiles/files/89385024619.pdf In PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af593173505---xililososikusoxepavenex.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608226cae2e76---76749455428.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/nuxezisiwif.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0d0293fb---47592871296.pdfIn PDF document text
    • https://renault-service.com/userfiles/85153581074.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/916828e0238344f876524d2439b4472d/44310698169.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/55151e39f94f0512c736bacd7cafb1b3/zirunabosomeror.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/feb79c80982dd3e4cf08444f7940b57f/runexaxomesatevavapunafab.pdfIn PDF document text
    • https://dm288.rs/slicice/file/feburazi.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0h8g1vf4soq10auivb82dnnms0/59708071901.pdfIn PDF document text
    • https://arerp.kr/data/file///banalugebodaberem.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/043b696805a0a00f5f0bb43fe4407d74/wetesuvifuxogutetakep.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/39n45376s2opme8jcnu282d4r4/kelefumigutebenodabudix.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/11625394889.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/74170107905.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/66802696269.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a0aca7fc6---86604057084.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be415f54384---xozekelokonadalefekumote.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_AFFAC03AEB0B2611.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/benikozomujezepudawa.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/pikitot.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/6j3c06k3gp4abbf471voe9cecl/35739917624.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/46967382945.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/bitozo.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/jepowinefitewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+a+fillable+pdf+not+fillablePDF 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_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 18284 bytes
SHA-256: cee554c86b425175524b572cd81916a8e2f3481942583e71da75040d8612bcbd
font_01_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13311 10700 bytes
SHA-256: bc893bbb80186f4296c0e529b6c2af2c505dff99854c80a9d725c34b46f29bfe