Malicious PDF — malware analysis report

Static analysis result for SHA-256 13404207fc426eb8…

MALICIOUS

PDF

95.9 KB Created: 2021-07-01 22:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8ba860b18661c9cb0aaae0dc0a85f3a9 SHA-1: 9c5230df0e318a88760c135124a2c1e1bbaed280 SHA-256: 13404207fc426eb873c5b555bb38e941ce003654194f8e1863c36b8b8a910024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous links to potentially malicious content suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc0d905bc---88700830893.pdf In PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e5e34db7312422609c7c99b7f97f4c8c/63682065834.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7o1eger8om9549o9rnfj0d1f56/gobagimatudebujopiven.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/24646176516.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/lomosumitedefevowupujula.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb53ea7d6---wuzavomusovofozizinobup.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/pebojavoxuk.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca6c451d2---zilubonurijirami.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0d1c53c69---dutewofema.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098714296f31---turixuxikesunexo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083df6e6e18e---46352116486.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160709533eb917---nubivogutuzonezobopu.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/daloxozojobupirewiwi.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865e39e2874---tudovorosavuliveso.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/sikudov.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e72471ac5---sifawebalitunatifibamek.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/32672672711.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c61008745b3360fcc045ab5174593d7f/49465238901.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/tugemode.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/r4405c0tng7dl7mlkfa7c46lmh/xirilipitipe.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/58782456876.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/kevopojoxevuguxipefovuj.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc97e15a95---gaxifofup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+abram+in+the+biblePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 18276 bytes
SHA-256: 0e68cd48ceb915903529e1fce5643ed4560b200be9e580cad9549377c779ceb4
font_01_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F08 10628 bytes
SHA-256: 36b227455fce2745ad3eb02e8794cad9b6c1235003c41b916fa37e25091523be
font_03_sfnt_off00015713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15713 17640 bytes
SHA-256: 86e4bfee3f7a2250decfc066bba22c7168e6f9664d2b80d0d7593208b1e29608

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