Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2c384cf81b243a…

MALICIOUS

PDF

72.5 KB Created: 2021-09-05 17:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e29f9d67680fe6bb40d5f7dccf78ea7a SHA-1: a8c0124d24bd8c9d5ca067f3e889153975e9d837 SHA-256: dc2c384cf81b243a38c2d8c86d760066c8a056721b8a0f85e6f457d50aa0aee4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a dropper for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=trade+war+filetype+pdf PDF link annotation
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/xebavut.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fb7369e89---manurusamefudaz.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/84536519497.pdfIn PDF document text
    • https://mfdesign.hu/files/file/66816642093.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/40dfe581bea37da811dd09af8d4d3476/puxeleteselafavuv.pdfIn PDF document text
    • https://path.mn/userfiles/files/62142485560.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9ldg6hiarvn11q90jbb9qb2p16/14556498697.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc2e7d77c---25379558803.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/6dd718f593f7d672928d712d54f6349f/93347507600.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/10d13146950e31abab66c57dad5b75c7/94195644578.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/11358504072.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbc921987---91389638216.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/46e1sd9b1b423juc0k5kmdof14/79526815965.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612d04c650e17---27040443391.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/8484793771.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1612c72e6260e8---53877999873.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/53449421488.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/31333656388.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/tinobikujinuwinotosu.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/7vgv5eeftmsc222op6i1ofvhb0/wizipiruwekanejazifimug.pdfIn PDF document text
    • http://packamate.com/userfiles/60678830660.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/90043684892.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/2383009295.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/49826197121.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/21b9792e9f881d2be8c5a2aee1d09602/54753911301.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_off0000ba9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B6 10264 bytes
SHA-256: 0d5214f9fb26e6aa1676db697be99bbdfa38bfb4d63a7c7d037f0ef4c561ec0e
font_02_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 16668 bytes
SHA-256: 061f6e9fd3702b483b4be04608cb9caf78f0a3ea006c29515d2862a49e00e79a

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