Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ce1c6b257b7958…

MALICIOUS

PDF

87.8 KB Created: 2021-07-15 15:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d20489957838c1d3a131dfed447a6697 SHA-1: dfb46927da0cc2d39155d5e29f6f82b3707cbeae SHA-256: b7ce1c6b257b7958be41114e96f4061bb2f13ddf9cd2974c03912f75936d3350
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it's used to distribute further malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/o05s1sq4csghp1it3gtkgjabiv/52645377837.pdf In PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/2a820e9735d41bac4536ef2a11b838c2/dakibavisama.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/85629790687.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d4aaab4d0a2413c94a98b43cf624cdf4/80892474453.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc555ddfa---7074787680.pdfIn PDF document text
    • https://actorconseil.com/files/file/gezefonevuzowelada.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/36143636303.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22ac95d9bf947c5800ac1c32b03dae76/30116521532.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/68953029509.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/1563355816.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcb1de3966---zoxaneguxare.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/873425f7feccb7c8eeede7ebe7150f70/podupog.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/jnm7ikvlglf6mh4epjs1omjat4/fojanifazuwel.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/jetogopafatitatojalomo.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160763020ee509---gudotabosugibosuravon.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abc7d81f4c---18565506954.pdfIn PDF document text
    • http://www.toptehnik.si/images/logogemekikalajafepa.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/67593729391.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a672d1bbf10---53727923339.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9793854af2ff9234ff34b83479e7a5d1/27688005711.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/63184387194.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607620c1d5672---bupuwadupopaxudu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/45521572999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=in+a+matter+of+weeksPDF 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_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 10368 bytes
SHA-256: c4ecc08634e0e8c903a9c66c2da6fd073920c427b6d67f1bf3f99d23317bca14
font_02_sfnt_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 18316 bytes
SHA-256: 9fbf20c3a51ddbb481e39197cc04b5ac2c9fb2b8cd09cf6e9a3f8f64333cdf80

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