Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e196a34459baf50…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 22:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 74eed83efa1229b1014dc056620ce6ab SHA-1: e6a14a9f9091b112268f952ba9bf07cd2c2643b1 SHA-256: 7e196a34459baf50b48b5054e93e165c56c8d0807b05e440c5b23b297f1742a2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to lure users to malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this phishing or malware distribution intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://savannahcentury.info/clients/4/44/449a5b3489ef279447e90cf6cdd72f1c/File/rodamebiliwogawugabesori.pdf In PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052904291613.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/bdi6cfc2l1g42f191nek1m4ot3/fijupobixo.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/70266087627.pdfIn PDF document text
    • https://hirurgija.me//files/7231876480.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16115c6ba7b8cd---87538812977.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/ecf3418ac12472f94d98a77f1e7455c1/60746593068.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/9891651645.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/55209904998.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/vorafeb.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/27317047737.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b892b637937---takepenoxomakopupebava.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/73812025334.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/riveki.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/lonogidigezajisusazejeko.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/udio1og2nie54bshauu4ui5q1s/gexutoluxakinira.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/50154297390.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/uskoflps6mo5qm0e9k49tuf5e6/87856266185.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/67486497256.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/gebesewuwemupesuzefaluwo.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210825_7531EAFA39EB0CFD.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///gojitu.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/n3fmpmq9suprqmkcql9gc4mh0i/42848894599.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/vokidomoxusilozot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=scythe+wind+gambit+pdfPDF 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_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 11048 bytes
SHA-256: ddadf968598def82f7880431e6835683f786e9adbcbb2f7ddfad56d36753bcd2
font_01_sfnt_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 17864 bytes
SHA-256: c1fe08951971c44ea50221cf6ecbdd679fe4cbdd3bc92d7233b12b904f950f88
font_02_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1