Malicious PDF — malware analysis report

Static analysis result for SHA-256 020bcef25cd3daec…

MALICIOUS

PDF

84.0 KB Created: 2021-07-06 02:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3c380cf6046114b1198d3c0859b5ad17 SHA-1: 3771ea9aa1a131e71b23a8a8afa072f6d1e6cf31 SHA-256: 020bcef25cd3daecc4ce6191f080382ae35cfe14c2f55973a910af3934ec8d62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://drafthe.ru/uplcv?utm_term=a+seperate+peace+full+text PDF link annotation
    • http://anhuizpyy.com/upload_fck/file/2021-6-1/20210601100600825175.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/mopaguzasoxozud.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac93c432d99---koxumasewo.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/75195652139.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/tipesexowenow.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/28390255782.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/87120251208.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30985cbd22---18072032205.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073de43e6302---81316740101.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc7b8adf89---80782820417.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0a06ddaa9---40823643326.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bcbf643dc---matuwoni.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/182079e4b937ec1f2bfc0ce64ac67086/nazosebimiwab.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d70037ebb46---66697533318.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/51110257244.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad86ccd8c---guvowikarokepux.pdfIn PDF document text
    • http://amtutoring.com/clients/865321/File/laloxodelomagaf.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/siwexojodanuvawidovis.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f093ee9ffa---roratipo.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/89936527156.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/331b8a306f98ba59852b26c3cfba507c/tujopunezoranokujux.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/81286813901.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/153b0351d6f08c4fdd5eefd9b7b19614/suvizorumibuvafedaw.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/56225902617.pdfIn PDF document text
    • 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_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10340 bytes
SHA-256: b7b1a5e64bb9ebcfc79d720bcf1a31a7c1f9d69fe0b1667e16984f4b84af9930
font_02_sfnt_off00011a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 15640 bytes
SHA-256: 3d4e6961248197bb6a424ce3bb4e4ea95197ba9094e1770c8067672a928cea46

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