Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5761a29910a2c7…

MALICIOUS

PDF

84.8 KB Created: 2021-07-09 06:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0318e4ace2e41f90f945811285537072 SHA-1: 557895faaf16c95c6b18f65f7f1234941890401d SHA-256: 3a5761a29910a2c7e87b1a233e2718763b5e1ccc6ddf850a9174b3cc1b0f80ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised WordPress uploads and disposable hosting domains, suggesting it is part of a phishing or malware distribution campaign. No scripts were extracted, but the presence of external links and the nature of the heuristics strongly suggest the PDF's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://garglob.ru/uplcv?utm_term=for+a+saturated+solution+of+agcl+at+25 PDF link annotation
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab4bac7fad---48387928684.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/efd4daba9a3496a9be74ab60490b89e3/34949636647.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb746773d1---zexit.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/birologubaxasikafeb.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/sirimunisugapivo.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/4352257498.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/vokob.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/30515371604.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c62a05780---nowef.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/vizikukafepez.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/26732430936.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ordvcksdv866gd3k4989adtaiv/23103628091.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/49864397604.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/92985411069.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/molonodapusefa.pdfIn PDF document text
    • http://kalikraft.com/images/file/napov.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45b27ceaa3---xavoraxifitalokin.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/govazozubilisejeloja.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/33971912964.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c610d740---28053872004.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/67655476427.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/votenowogazirevise.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_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 17828 bytes
SHA-256: bf1f575dc4dc594a02584ce2bb89135144636c7f48260eee0289edfe2ccdaed1
font_02_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 10980 bytes
SHA-256: 80afc0a23715038211411a7eec39356502e2e60e9e11bc79ed3073ff3c589f4b

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