Malicious PDF — malware analysis report

Static analysis result for SHA-256 f198933abffe436c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-19 19:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5579551f81e0bb0d22d8736ce147bab2 SHA-1: 4bbe9150611fb09996a32c8f831aacf65a3f912c SHA-256: f198933abffe436c3ddab7418230bced4cf07408eb5e9c17818b5e5675baa867
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised or disposable domains. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://www.programasaudetotal.com/arquivos/file/60697959200.pdf In PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/3993187440.pdfIn PDF document text
    • http://strandedtattoo.com/file/pajabesubodetisa.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/79588233403.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/91839150120.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/jenivogepekodaj.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/cffdb5261ced3e7c1ae90a0ffb860cf3/movujijepanibiluzovifanik.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/lobibigumedazowapojepabul.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/dedopidovax.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/80528373412.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/1302672923.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/80510119458.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///jenodatejibav.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d784cd9d23---49871864143.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8da2e77beccff8a2ae2d33d1e18e7d07/wipovopodare.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/futodovegalamo.pdfIn PDF document text
    • http://svx.su/ffile/file/pamerolakinitifitagor.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/99260581399.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/ruwogoramikegikamar.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/xizokuzagewoxado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gacha+life+apk+1.0+2PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0F 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000b60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60C 10480 bytes
SHA-256: 943bde9ea582e1abf0f6f99238b027d7194aa21ceaf2302f58f0278520638fab
font_02_sfnt_off0000ce0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0B 15664 bytes
SHA-256: 950c5dbdc6a2d3849ae7f3bef281532eeda25e7918781280582a82c5443c30f6
font_03_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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