Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c3cf9e3e520f59…

MALICIOUS

PDF

91.7 KB Created: 2021-07-02 23:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b220f7b2d660ec6fdcd5d9d0c5c7ed27 SHA-1: 3ed348563bad117173f56acc1685c96b9606c0f0 SHA-256: 62c3cf9e3e520f596f428e08dbda62a9e8dbe0e2f0b7a1e735cc7e0a350c7d76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ec4439d2---risolinimisilazinevin.pdf
    • https://parfumzone.ro/files/file/wawumabugolegarelar.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd83c8e356---90533627582.pdf
    • http://limoride.net/gallery/file/34120936886.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/i78jdmoe447oldk1357h1opbht/xobizinoma.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763c602fc5f---nagekiravusoxudewazot.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21afe7dca6---37353727918.pdf
    • http://wasserburg.pl/userfiles/file/12383424223.pdf
    • http://matstravel.ru/userfiles/file/rabutatujutorujogit.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/444c8b7b652161fd51c13e48abcfeac8/2898218198.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607616cbe04bc---18854615838.pdf
    • https://samarpanbharat.org/trila/userfiles/file/zoxas.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0b97bcb1d---90947350765.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d6e953495---kivujikesiro.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd485aa96---novalawiripat.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608727bc60d1b---julivupajos.pdf
    • http://www.vegagastro.pl/upload/file/85904833860.pdf
    • https://devcons.org/uploads/userfiles/files/tuvokidusaxig.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/7ee5021fa455fa8e7a54966af840c4be/tivexexaxejovebusipoxuzag.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ca0bb4b1529d10107146923e9a003288/90083688247.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089588a803cb---nakazirigitogesubenimibe.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c885ffc1713---75654155002.pdf
    • http://www.awakohchang.com/image/upload/File/4853705002.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/tezapufone.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a962a92b953---18023906337.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=st+cyril+and+methodius+church
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc83.bin
af5a33dd5fe5fcd53cef75df070ff5170578219656604a29b22f1c7219a3587a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 10924 bytes
font_01_sfnt_off00011596.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 16792 bytes
font_02_sfnt_off00012da8.bin
083d59af1097b40bdec2dffdcc9d27aaa704e6538a43dd0ea05c9519973d560d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 20036 bytes