Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fb3f49ff31b24e…

MALICIOUS

PDF

99.6 KB Created: 2021-08-03 13:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4972bcb2d756e94d7812a5e1ee365a0d SHA-1: 7750c54aebac99aa7634e958de6fd1fb5831ec74 SHA-256: 13fb3f49ff31b24e727542cfdd9c7c9d3b0b68e0b0acea68ada72d5bab2cda06
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress upload directories and disposable hosting domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

Heuristics 6

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=o+poder+da+ora%C3%A7%C3%A3o+e+do+jejum PDF link annotation
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08ed784cd2---35556901852.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/7mvjitjb4shp4arpsuj9v6ln60/saxowiwifekeziwig.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/93512467660.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kolatubeme.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/nosuxisek.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e18d100b9d3f852d7f71cc6c59f876aa/67202107578.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/96152134640.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac0e41d61---89454361683.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b08b0633b275888b96b65eed6e93fdf4/94477995962.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a22k2rofm3l46g9t4lnjc0h1d2/nigotetenamobosezomojefo.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/javuligaporuzeke.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/buwatebosozesikatudoniwed.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/90koqu291h8me3hofu143h1qsh/73530607138.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/80d1a626ec0bc3c0c24b25a1b3374a18/12039952728.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ot4jb0p1rtkfmkp9rnd9us7n30/15792164971.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/naxosevegeto.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606d929cb92a7---nexagew.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d33468bd1abdf61c7c834937ef4d72f6/94000176334.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/fazetubiwonigutatanazakeg.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d5373ec5d1ea3517e082c9994686fa66/73534736369.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/nezewat.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/0ff242bb16ebb54e596eedf594b6a1ab/41652575157.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/kbuglvjsig0do6d1pk05efurcv/25357983058.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/30099697399.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf110c5cc---vusokiwofupi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ff6fee28184---3688550849.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/73172092116.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_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 19764 bytes
SHA-256: fec7d96e476b3ad76942a85ad4553da6057d4bd1b1cbf75d8ed46a816e164085
font_01_sfnt_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D2 10764 bytes
SHA-256: 35db1a036f306995406061d15a26036556e74dd60c37f0160cfa75956a5079ef
font_03_sfnt_off00015f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F23 18456 bytes
SHA-256: 862b20e7b42f3c6cf561d05a5799448eebb72c53c30ce7364c4f00f1d6ae5a16

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