Malicious PDF — malware analysis report

Static analysis result for SHA-256 77afb83725480129…

MALICIOUS

PDF

86.1 KB Created: 2021-07-27 16:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 45d9083326b46bb06896085dfd9f88aa SHA-1: 06c1b3fc7fa242f82d1a96c02c7f6a46018adb64 SHA-256: 77afb837254801293815444d2bfa8ad9311d18d3deb3f43ab61193487e083da3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://hanifeugur.com/image/files/310482425.pdf In PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/eabc8155f307fdfd32173510a8e5849a/62953734302.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/7469705285.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/vikujezomufi.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/8a384541cb926ddc334d00c82cffa66d/dosazibu.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/20399922900.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/mosepazawamopesufokexeziz.pdfIn PDF document text
    • https://amblamy.ee/upload/file/vilizopepebunumusugevu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/snohr30sga0e9seuata84qjut5/85462815043.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/14990702510.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/p50qv3756e37eve97cnuugolee/87781816261.pdfIn PDF document text
    • https://kawanmto.org/contents//files/dasamonosifeme.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcf2928bc---vivowaj.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1204c903---vulazuzizuluro.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7780fa598b---8497804536.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/wawunipapol.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0137f54d67b9d1c08917ab0f985f4280/81612318840.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/38cfd84ccfa9aebd52478f8830e94009/69207346645.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/91432021070.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/b1321835a868083de2331027ec235c16/rifaz.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925eef899e5---52447967449.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/xanigilokuzos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=driver+booster+7.4+serial+key+2020PDF 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

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_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 18168 bytes
SHA-256: d05503e9803a55da7ec22ea63bf1597942f5916dd928c989cbc12f47bd0200af
font_01_sfnt_off0001197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 10848 bytes
SHA-256: 9a989bba2f24b0af49ee6f5550fa7e00313b3269ed2db8d7351d0baebfe287ae
font_02_sfnt_off000132da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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