Malicious PDF — malware analysis report

Static analysis result for SHA-256 6077345527fb01cd…

MALICIOUS

PDF

127.7 KB Created: 2021-07-07 08:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a745c11fb3d246ee60fb657514c0eba4 SHA-1: a7e2230fe1060fdf3b335f23f095d3650c2d386b SHA-256: 6077345527fb01cd449165042b452fc441d2c1a4df7799723d2aff568e65076d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to lure users to malicious sites. The embedded URLs, such as http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cf95554e---57907517295.pdf, are key indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://textosolutionslinguistiques.ca/upload/editor/file/busik.pdf In PDF document text
    • https://aronabritcan.com/userfiles/file/kogigimod.pdfIn PDF document text
    • https://airbays.com/userfiles/file/64912615310.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/mifodinedolajunen.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cf95554e---57907517295.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd383c7fa83---90153014174.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/redezavubeb.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/0754ddcdd9ee71978bb4a13d0ba8e77b/33471112287.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/45657663699.pdfIn PDF document text
    • http://sireny.net/share/files/pibaribabuxoxudolid.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16093b6751ddfd---86400689174.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/60382641244.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/direvuxemenazesot.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0758c34b4e---kaboputiwodevuxobuvalel.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e97563a87a92e14262549d072e61bf0/17570850777.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/ee33846f5d9649cd6521cc15e13739d6/71749358651.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085f771b1399---toderap.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/9a26b962611dd457a590ae05d76d2cda/18423697739.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/cad71d79f3376a8e2a59af3d29e2aaa2/nivemido.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160902deaefdd7---80729016213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sonar+used+by+batsPDF 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_off000193a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A9 18064 bytes
SHA-256: 01a625624fa96079e667e244a6afe93edfd8e4448c6ca7849a3cf6043a4a64ae
font_01_sfnt_off0001c1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1B8 10532 bytes
SHA-256: 5fa6205ea80ce1a118cc1e0c0379aea439b85427562acf14848f27699a99cc27
font_02_sfnt_off0001d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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