Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c02c4e8bd57c50…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 07:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: caa062ab1c3abc814d547bc54f9496a2 SHA-1: 7918a1b32540d4c6bd05f3d874da863ce2e436c5 SHA-256: 58c02c4e8bd57c50cc08c330969e0d348fb9b2ddb4662324b243803500239869
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm hosted on compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the execution of malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gagiongvitgiong.com/ckfinder/userfiles/files/3822359440.pdf In PDF document text
    • http://angelcabrera.com/FCKfiles/file/49017795299.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/rofilazuko.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/57113992009.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/07/27/sefizifefelox.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3bfifl1pj6ab7cbs3947op65t4/93022130752.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210624212854.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/92358053638.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/560ff626e7f08ff145fdecffed626ab1/zuwezatutudopul.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/dfd680a4e7640b54cf8f182884ceba57/voxolunulu.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/76978255757.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae4907eee---nogevosirusode.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/worolefesedekiwaresise.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/0263c88f47472715e089f1d82711f0a2/61528905366.pdfIn PDF document text
    • http://iltorg.ru/upload/file/62405607895.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f857a016ec5---93209248284.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/d0d4403553e4d37f3afc11742c25c587/nexazomitixiwuzipobet.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/1brmthssskoi7c3dh9dqbhlck5/62864452087.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/26576611119.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1d4bb5345---23983238643.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8f3692e89e821cdf224e4e327a902b1b/zudilafujofatukaberiba.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b990f905bf3---dixaxolimoxodesukewilan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=un+metro+a+cuantos+milimetros+equivalePDF 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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10708 bytes
SHA-256: 4885b876589110d5cd76989e2b3c5e8c80cf50b6f212d1695c7f62022e7680cb
font_02_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 18400 bytes
SHA-256: cdc540dca541b0d755436f303555aa6b581897589f85e0324c20d640f814cd07

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