Malicious PDF — malware analysis report

Static analysis result for SHA-256 9529e850af975231…

MALICIOUS

PDF

165.5 KB Created: 2021-06-26 17:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 742b32c448ceea5f8efad2b990842a84 SHA-1: 68ce1fae069f826c68c4e58cb173ad6e7e56bad1 SHA-256: 9529e850af9752317bd5f510a48682a3f8488996169c31579f9c6c15a57d8aa1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a link farm pointing to numerous compromised WordPress sites, likely serving as a lure or redirect to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=straw+hats+all+members PDF link annotation
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98036d24de---99596447211.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/69764176030.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/78281471266.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/856c9f03b73a96b2defc44d90de1c509/15323436926.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/tonixeguvadopilolujif.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/rlmle4r9oeo8f6pkc15qgk3fg0/31814046331.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3q1ovd6s5gv29pnjtvvtm2eqo3/41897893585.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/naputarasakisopuvenuferet.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8852e4514---miwinewojepelarewezofep.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/kr3n1udi6nat7tlgmcoev49o56/68533153196.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/5241789189.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bde5b9cd7---32192584997.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075f19d8875d---xufugasireroxamuwumefura.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/36402990185.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/1605599212.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/faf25174c9b840ff3966f325bbcb255d/51911408289.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092110adcdb0---23204922587.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608512f2e0735---861975530.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a559e3bd243---xumotodejoxitivilet.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/17a774ae530eb12b031d31e2b2ac85c9/27111409104.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f47808f3d2---74929284826.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/vojujifufo.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a18f08fe8---givatelov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20075 18400 bytes
SHA-256: b28879a3c9bd34065ce0c8f2cbddc5f48e3a22b5d28df7049af074fb4bd8172c
font_01_sfnt_off00022f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F9F 12900 bytes
SHA-256: a8c7fc270b877ea6ee49c13439521227d06e17df2acf62bbcf005bce06095251
font_02_sfnt_off000258a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x258A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000270b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270B8 10356 bytes
SHA-256: 24dce2afcaf59990530eda98f8c72fae6b4d5107ef5c6f24ec0b223affd2a688

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