Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0902e98cfdfca7…

MALICIOUS

PDF

95.4 KB Created: 2021-07-06 08:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 00578c10b7268549148c4377fde2cbfe SHA-1: f0fa997539acdb256d26d33601340266e267da15 SHA-256: 8d0902e98cfdfca7a4c1833e41dd9d1d7be383d58c41d0b0ac5c3ff7a3b20486
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to a variety of websites, many of which appear to be hosted on compromised Content Management Systems (CMS) or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure itself is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=select+rows+from+dataframe+python PDF link annotation
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/xuxujabojiguzatejifelukan.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1b3bacf03---zajoteberiga.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/82145190729.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/kuwiwakabuvuzozemevamorez.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/55c76804881f1c7bacf4cd3e192ce790/8889163486.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/gunotega.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/vipogagobe.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/11675358288.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/fabafurawodanefipafane.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc037c1896---25025660908.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/05c5d6b8e50e6187f48c7ad52522d0fa/rukuludapoxowiferowelepad.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a4def97ef9eee2ab5821614946a43a99/sefotogar.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/kozemerubosesasosimox.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/pimixotileralen.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/24402673205.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ih6fl800u7qekkh1goqdhc24ni/25206134448.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/72714451585.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b2b773f7---87653023093.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/35a30eef8207923835598a5fbc64fcde/jeropukolefizum.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/rroejlo0t8m0d4lp3mgtbh2mt7/jenidejetirosol.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a129c3234c6---nevavurawepulotiduwo.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/anq3reaik7vhdhdq23hb04l4qe/8149965218.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3839f2b0d---22044132364.pdfIn PDF document text
    • 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_off00010ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC4 18064 bytes
SHA-256: ef93e2f2c5dfe0d50c0c77c516803c8abd7b926a87c96df89579111382f81ef4
font_01_sfnt_off00013ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B9 11068 bytes
SHA-256: ee38fe5c13323c48d4f793ac00ba79da445f54706ccf7cbcb3b68c78dfcc1e41

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