Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c800c4836c48fd5…

MALICIOUS

PDF

86.1 KB Created: 2021-07-03 02:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 011ff2d919a3426f35fa83a26017ad26 SHA-1: 101b3b02b0b77cb506181ad8aa2e2a98f9c4b886 SHA-256: 0c800c4836c48fd58135ec0ce96a8d050db2b8f37b2fa41066d5964a9e3b65a2
156 Risk Score

Malware Insights

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

This PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://catamma.ru/uplcv?utm_term=between+shades+of+gray+full+text+pdf PDF link annotation
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3d9e6f46d9010af35b5877065801e52c/1496992398.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/f3f940bb6dcc36c492bf1ad950fbbc1c/buvek.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/0bb4c545664f44bb98dc1a8a2c482e8b/xorenuwixolebaduxevufole.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/vogirape.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ece00c7ffe---59144572269.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6ec78c2f1ca56019f2b6427543c5b0be/vafanebirubo.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/79824213309.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/qcklea4segfglbgcgu5sash67r/12270762904.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/ken07l8msggs9vaqihmt4dd5g7/sokerexopigawovosa.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/seloxinixiti.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6d022a2a4e6c3fbc1a985f990d24dc73/44558095823.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/68483439155.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/pavumiwosakagovovu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f2cf73fe8---butoge.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/2e950ababda6b52b4b717d37555915fe/remimerezed.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/tiwuvomaso.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/2684342749.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/2085ac60d37f69b2a8af30eb35863acb/bijogusitomamatomurijose.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/84629772214.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fae80cbbf2---dojadegapuripikatubag.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_off0000e6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F3 20852 bytes
SHA-256: 92837a38ac28f9092661f3394df0457dd27398f955182560eb9863bd69971165
font_01_sfnt_off0001193c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193C 11140 bytes
SHA-256: 78341999e5ea7f2e107d86d358701c15fce8bc5168313399510d7d84aa9b0ac7
font_02_sfnt_off00013329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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