Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e09c102c1fbce8…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 14:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2998a1dd129ecf7666feb58e9aa6a9d3 SHA-1: 493086080ee7a590259764633c3de99ff96edf13 SHA-256: 06e09c102c1fbce89257950005069957d6cc1d41bf6f4cd8135eab35823b1d81
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a 'utm_term' parameter in one URL suggests a potential SEO-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://bonsite.nl/phpcmsys/file/rowomitidum.pdf In PDF document text
    • http://tvsatkrosno.pl/userfiles/file/10113139413.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303ec65e323---28150351009.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/jokirenebumoxixaju.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/dadezitoxurazosubow.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/13386818546.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a6862fa2cfd2caa208f0d31d1e253307/tonabupijuj.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/rozuvor.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/xozafopekowo.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/20669251240.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f51c6dd2adfab06d0f807ba9759ff4ed/3057215248.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/50453563609.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/74770461697.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/zomagaxaxek.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210911003351.pdfIn PDF document text
    • http://4bx.pl/public/file/28371412975.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/2286819327.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/loxibajaguxumolapurobeve.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/dejurobonetabugama.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/61375150479.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/77838510798.pdfIn PDF document text
    • http://standardamulet.com/files/files/kutexutajokiwirali.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/joneguri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mario+kart+8+android+downloadPDF 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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 17336 bytes
SHA-256: 7a78e1fa9d3fbdb6322f227e9c06735a11f765f3ad089c29b1258e87f99238c3
font_01_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 10320 bytes
SHA-256: 31a681d9c7945113a2ea8f7a547b21b57bfd9f232916b7904dcc6dc371b19a92
font_02_sfnt_off00012319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1