Malicious PDF — malware analysis report

Static analysis result for SHA-256 931decde8f074703…

MALICIOUS

PDF

81.3 KB Created: 2021-09-06 21:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d9fb027cc5c0ee271b7fb5232a646cf5 SHA-1: 41d57653acf5311d7a74dd91b9ea5e19776361ec SHA-256: 931decde8f07470336a417b60e56a14ef8d5712938e98038722300d444586468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect the user to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://niestachow.pl/data/aktualnosci_imgs/file/66446347828.pdf In PDF document text
    • http://abwlanham.com/uploads/files/17776122187.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a01f18c3da0---solawezusax.pdfIn PDF document text
    • http://co-mit.com/uploads/files/bonibutaxof.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/badupiwarufika.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/wupak.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/1397847454.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/dccfff7e1df47acddbde1ce56c92f255/23459186982.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/87ce5b6b00bfe312b7471d7c183900b8/40583692773.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/70377549666.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/664272292.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/45fdc093d38c75386926ebe5183c4a1e/85679154436.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a94dfb46e7e---16322489932.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/9j2i0d771jj029o2eourt5uava/21601289241.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/20064236347.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/19126273991.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c41423dd30---vasewusilitulidilutanur.pdfIn PDF document text
    • https://network-italia.it/file/fefalivexibafoporuzaruv.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/835qrnhngnff7pbhbkt5egncb0/94665087535.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/xaliposelebefigaduviki.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/2ea531c1a87dd9b1fec90580827a6555/fopogekegala.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/futewawoveziwumafumeko.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/66718582599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=solving+rational+equations+worksheet+answers+algebra+2PDF 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_off0000d8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E7 17056 bytes
SHA-256: 872d30407edb2e527cf166a5974368a8aa6c239d9e3e0a2853820aad5f7d72e7
font_01_sfnt_off000104c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDB 11212 bytes
SHA-256: 01363a5f3f3366f6de6ea19685115ee7aef9d49ab33603319e5304d3a085b606

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