Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c300124c7b0f49…

MALICIOUS

PDF

74.6 KB Created: 2021-08-28 02:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a85b36227ac27df36325be394d4cc027 SHA-1: 35a4430678bfdd1ffb2085c9c70441c963a487a8 SHA-256: c7c300124c7b0f49d9a177b316c8d63f96723c708ede6c934f37fb1054bade52
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://drafthe.ru/uplcv?utm_term=bible+quiz+multiple+choice+with+answers PDF link annotation
    • http://cc-loges.com/uploads/file/sosuredevarekixorijipoted.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608db964b3918---56263555974.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/jalosunikisafeluguxumival.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/58204543841.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/jujunurez.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20218211549278965.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/68784139754.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0b84ed5cb---39878621595.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/95562541704.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/290906571470.pdfIn PDF document text
    • https://t2sc.me/userfiles/65516362095.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/et31obviocam1esgk3lei5ev84/fotofuwokufazawit.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210730_D63FBE8FDF3AE7F7.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/96142480757.pdfIn PDF document text
    • http://northcity.rs/slike/files/pakowejaloxosuda.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/4608b1cbba0c3d5376c4d6642f639f9a/86086807980.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/vulidenazabitokuma.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/34463988235.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/75143059859.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c31f8114dd---linilexasusijuliz.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/31299712695.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf07f68a11---fodumuxanabapebapukik.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/pekeguvavi.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/rurikunilopixa.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_off0000bea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B5 17064 bytes
SHA-256: e9dd2f8479a2444ce3ded28251ea891dd8d2306a827de45e20655b6ba6cb6b3c
font_02_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 11224 bytes
SHA-256: 7731b78650f1148ebd5aaebeec4d5e63d5290a518e935621c39036071bc2f51f

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