Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2074b3e92671dd…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 06:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6f0ea4c4a6726a1687b52ed931c3f655 SHA-1: 1130ea7eb0edfaf66031f7002a1cd6933a3fc069 SHA-256: 7b2074b3e92671ddba6c36cea5849bb90a9c24bfc6e68b521583625beb8ed485
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of these links, particularly those hosted on compromised CMS uploads, strongly indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161401f799737b---fufirilulezujapo.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/717ff26c9ba1befadacdf808ed5a8265/xavux.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/dapiretawosawaka.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/pegabosejukawavikanog.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137453c4dd14---fexitefezonegutegige.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5cb14905b---jufimudimowodovuderezito.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/mcu7s9r28vrprtmj5qi6t74af1/kozezuja.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/lezugixoreponu.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/79538465209.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2cf3ce377230ae424427b59858dbe77/16927200552.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/35567181610.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/xotekimenivekobugebivozo.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ttehg5v460sc33jnfgi61teiq8/22886622352.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/kulojagoxowojukijesilosun.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/14140599199.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/87095276044.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/88625899216.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/vexudatoxetokojogojizu.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/kikudatoguputufumegaxofe.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/97346287614.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/97741028306.pdfIn PDF document text
    • http://futboltotal.net/images/files/92754340883.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/46136028874.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/78671631677.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/dosujazuvesokonivirora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+online+free+123moviesPDF 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_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 11600 bytes
SHA-256: ba2259d57f7e047cf3bba623631bec2a9f7e7c2e6b0d40000eb27a1fa90d1c89
font_01_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8F 18076 bytes
SHA-256: a74c553f05729dbe67a32584e8e84f0f18f9c999d7410756944d4fb5d28d9241