Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2d1bfc7c14cb96…

MALICIOUS

PDF

91.7 KB Created: 2021-08-10 14:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8cc708c04d67b7130dbcd6e7cd5acd6a SHA-1: f5376eb4ad61f499dbe3e831818d14ef2485a75e SHA-256: cc2d1bfc7c14cb96c4f3589d9e9e2cde46154eb60f96a9303d24f9fe0e455a9d
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised or disposable domains, identified as a link farm. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading a malicious file. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://10kshot.com/customerinterview/ckfinder/userfiles/files/luvoruxixaviluxoleviti.pdf In PDF document text
    • http://sakem.org/userfiles/files/66897582244.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/mafoxokabotetovisezi.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/wetowunexovevepuwe.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da66907750e---zifukotizixede.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bf1d2a299---rogamejamasanikoduni.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/68212524054.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a81697b8a5a---bigoduranemanedojodagosid.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ec5675541---84288571082.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086328ead892---jedepojezopini.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/39169995791.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/liwufarifukedododo.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/26606441255.pdfIn PDF document text
    • http://strandedtattoo.com/file/16456064672.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/60692928218.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/88482764483.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bf851e4b155---1506501908.pdfIn PDF document text
    • http://digifast.cz/userfiles/sopazowuxaliko.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/jasifibel.pdfIn PDF document text
    • http://asfalon.com/__files/file/tomiwimaziw.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f4d57acf---kuzemejugidofab.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/1823148212.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc7ffbc33d---tisozajesi.pdfIn PDF document text
    • https://csodamalom.hu/files/files/2894431006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bahubali+2+tamil+dubbed+full+movie+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_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 18220 bytes
SHA-256: e285236e5656e27ab4d0c46f1f029dfc1d6872a938af71336699b8902b9d7cb6
font_02_sfnt_off0001461d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461D 10916 bytes
SHA-256: 59d1f2ff36b3c1b1cc317ba80ca33fbd0e24d06c4223f36aa0584cf3ff15853c