Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbaf552ab2ca633e…

MALICIOUS

PDF

83.7 KB Created: 2021-08-20 20:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ff0a7affac8a7a75147a2d8c0a26e1da SHA-1: c550d400c216606cb07392f192a38231e74ae9d2 SHA-256: dbaf552ab2ca633e189a15e00c84bc8e30b95350fbcb815a78597acba15d04f1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting domains. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://acryl-bg.com/userfiles/file/basivokowixetekavumonas.pdf In PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e807b9a99dd0ef3dbf9794406f7157d4/lijiratinovozepegamazi.pdfIn PDF document text
    • https://activepymes.com/pub/file/87237783533.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c12c06cc9---92664297628.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609167cc4eb02---19026356110.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/78997563623.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610a595420ff6---11907039862.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/wugusufisenaz.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/jaregerasi.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/kekibiminawejudixisukav.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/780a83cc0b758dde80330d0dbaab0f90/rukarobepizafe.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/91267017353.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/lafiradipelalusomopora.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/8865719635.pdfIn PDF document text
    • http://prmakeup.com/Image/files/gofejowisaguvufe.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c703d6da7fd---jovifujet.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/95594360131.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/18924058585.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/jelozoda.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/34648316929.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/verilapexodumetudonasoj.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f1516ed303b---32322722413.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/nalomonolenozizojabojes.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbeaf9adec---fagazedeji.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/mudab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gameboy+color+emulator+games+androidPDF 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_off0000e45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45A 11104 bytes
SHA-256: 793e57ccea5e7e22f810950fcab30aded4c059453e800a0682d83d8130cc04d5
font_01_sfnt_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 16408 bytes
SHA-256: 6f8c2df4bd600d63893760cf35e7fa1ab43c78f154c768fb7d902f1624301266

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