Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6b92b0019eb3e2…

MALICIOUS

PDF

75.2 KB Created: 2021-09-18 07:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 721892339650a36bbe3ff3c87720bafc SHA-1: e956b57e9d8965447ce302b4577ecdfe3637a820 SHA-256: ba6b92b0019eb3e26a47bebef6ccbd9e47dbef218c104cb774d24e7c34106364
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall nature of the document as a lure suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=conditional+sentences+test+pdf PDF link annotation
    • http://ciskmv.com/css/file/damurokugomitelugomiz.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/56063306632.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/pevakaked.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/rosat.pdfIn PDF document text
    • https://nexusmediation.nl/files/79240982131.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/34506424437.pdfIn PDF document text
    • http://reichspfarrer.sk/file/vobewipef.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f39ee12a56f35c545695587a489dbeb2/rujebowodisufuk.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc2fcc4f7---53136689572.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161401c8d8c60b---vinaxujupefavemak.pdfIn PDF document text
    • http://ahchala.com/img/file/sudutoxivelufepa.pdfIn PDF document text
    • https://riwg.in/userfiles/file/guxazananakarolag.pdfIn PDF document text
    • https://sergiomauri.com/images/file/mixomo.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/loritowovolusegemanavega.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/puxumunopujobaxu.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/55888958145.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/fabebar.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/16566720764.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/24827357845.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/24953049200.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142afba32fc8---84466763937.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/39961773614.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/4148746589.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/i9rake0hqi481de25v9cc6dnd3/gadonezajigebonerojadenag.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/12283955656.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/josadazodaraniduz.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_off0000c194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC194 10544 bytes
SHA-256: 1e063ca56f73b5acdbbe3fce67893963fd1e42b0cc323e1a7625ff71a24e494a
font_01_sfnt_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 17424 bytes
SHA-256: 651bfdc01313eb069cd37f902914a6500c79aaf99ad8c4e0988164fa3589f72d
font_02_sfnt_off000106b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.