Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a434c3ec2f8fdcc…

MALICIOUS

PDF

107.3 KB Created: 2021-06-26 21:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 41c14d2fd504ad0d85deae14b36338dd SHA-1: 2d878fa8a198881dd465a4679e0c4ca82b7d6c9b SHA-256: 0a434c3ec2f8fdcc13668cef11a2967579de737ce530184d1579fab792b64e46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce2a8653c---35617787704.pdf In PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd730692302---xamulagi.pdfIn PDF document text
    • https://chp-travel.ir/data/file/94219083805.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b80786ea0---14893549537.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/20134092874.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/gofawozesibavola.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e004267f9c074492861125e7a0cc030f/kinonezubojiwe.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/87745269676.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c89a4d4973---xedutufojikazagivugubiwal.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e2b102ac---49098987438.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/12d8d9edb21fd3393747dd850a070846.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/82188132845.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ae4c9260---37837255276.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/modesukenumatiji.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2cdeea5bfcc0ecd5478d124ea281a945/37279808156.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/lulijelavezedaguzomi.pdfIn PDF document text
    • http://uamarkets.com/images/file/66841995556.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4eb2f9d4---30953672956.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/82835547651.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073854677528---28992545204.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/bt4mfv07afmd19csucg9n1ceu1/92963355899.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/0ea95d4f2b85067d75a45d8fc38099b1/xirubidemagenezatolor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=best+meat+rabbitsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001429d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AAF 17876 bytes
SHA-256: f215371af9ad5800afe188c1f2bacb334770effd789d91ab1710810df01c1cf8
font_02_sfnt_off00018958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18958 10192 bytes
SHA-256: 73840d1d4b0b113018c4df8960f931f31835eb82595cb2d81ea6e3364dc971b3

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