Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcdb517e01d1a7a…

MALICIOUS

PDF

74.7 KB Created: 2021-09-07 21:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f9fec7718c9891e96fc62bc74a17d313 SHA-1: b9c269d3c3ea57dc97b98e7e7256ef0f9e7c9314 SHA-256: 0bcdb517e01d1a7ae604f89c50040bd12af733084c5aeab32ecd99c71d28d8d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. Numerous heuristics indicate it functions as a link farm, redirecting to compromised WordPress uploads and other disposable hosting sites. The embedded URLs suggest a phishing or malware distribution scheme, likely leveraging the PDF format to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://laborke.ru/uplcv?utm_term=mechanical+engineering+drawing+mcq+pdf PDF link annotation
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/df521c84d0eb13c68e779f22b465c4f8/57526221312.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/lolusi.pdfIn PDF document text
    • https://dhesient.com/media/pamun.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160af6788cb021---26712293882.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/13377476398.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8128f1f7---11512039952.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d207b6dab---43062216722.pdfIn PDF document text
    • http://beiks.info/public/file/67969831974.pdfIn PDF document text
    • https://lecachet.fr/docs/files/tuminowetuwuxazuniput.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0f86107b4d4cce8e51c4833893053fdd/wumujoxebosixasebudi.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/70776397363.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/0c4nllh45qd7qpu63on0amqk53/507183511.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161282f9299707---19519379311.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077a3c235a06---61638109064.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607765ee22422---repenogomazorokupuso.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79701276405.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430024307181.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/84826129436.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/zerufelevotorazatewido.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/2i6r1qk2b92p35riac7hpb9nt1/tusafixoviri.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/3254259827.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/kinibotabamavuxowetowu.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/56860206633.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/41668000847.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_off0000c089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC089 10908 bytes
SHA-256: 5b398492daf33b4998f5ef9d4e3d723935eb85ea54c1e62b749a3c86a11dd723
font_01_sfnt_off0000d906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD906 17208 bytes
SHA-256: 92385fef99dcf59b89d02505368251ec41a04dca3957b338b6346c5e477661cf
font_02_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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