Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd234e1f9f6b5e4…

MALICIOUS

PDF

77.1 KB Created: 2021-09-04 15:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f1f57e84f147e5a53a30abc7019abd5 SHA-1: 30912952129ad020459bad756910ced2d51afaba SHA-256: 3fd234e1f9f6b5e46faaf3eaa20e20e756c68c6b0118274b25ccf3353925ac6d
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://cructi.ru/uplcv?utm_term=godrej+compressor+catalogue+pdf PDF link annotation
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16114f1efa5a28---41708800477.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/24670422742.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/suxuzipupali.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/50301998562.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/85804657182.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0f5c41ebd5cd7215d6be5b073ad6d6e9/tolowelazarus.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc56746d35---28903415428.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/19758757001.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/duruwodureziwoxazimafid.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdef0b9d781---67933229239.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/20419355796.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/67bb510064d5c5dce2ae5f02252d8557/22113959789.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/47170046318.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/3fdd7ad76d0fa99d2693cc9501ea23f3/fanuximaguj.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/zevuxazudozepivufu.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/xibarenivunim.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1629069687.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/tepumojupa.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/bijusigobotifirularef.pdfIn PDF document text
    • http://lactopad.com/uploads/files/xubaw.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/16138582120.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/45762210284.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/55665889179.pdfIn PDF document text
    • https://kildevangen.dk/files/40174278322.pdfIn PDF document text
    • https://bamor.org/userfiles/file/12603271509.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0C 16184 bytes
SHA-256: 7ee4de43f48b0d1d46e68fe379cf4cd0e9633fcb36bbb0c180a38c1754eda9d1
font_01_sfnt_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 15772 bytes
SHA-256: 20ba950fb527952a388ffadd4bd6863d6334b48045b6747b5a12b99c266c468f

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