Malicious PDF — malware analysis report

Static analysis result for SHA-256 69412d345777c6fd…

MALICIOUS

PDF

102.1 KB Created: 2021-06-30 04:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6bf53cce8f54bbd59883120f1bad2e96 SHA-1: fe5ef294cca3aae71d6355b18fdd033a7adc6ce2 SHA-256: 69412d345777c6fd2f3aac33e441fd469d2f3c1bff5d740e72e0f1b3bfa23d5f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted, but the presence of multiple external URIs and the 'link farm' heuristic strongly suggest a redirection or phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/5db941485d815860f1e19c3dea0ddf25/82091555123.pdf In PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6165e52390---4998708048.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/29439334870.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6c3c05a51---tejogarizagumododofa.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/sarunaxukurubanabo.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a944068cfd6---67044711837.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a04ddcd36---nixojotujoti.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dd4b74373---bedumufatedaxuronazes.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/84050181080.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2750c5b870---12105274550.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/50582061239.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/rafujumepiwirevixeza.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/63165746492.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e5778271---38644039310.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074a712c6efa---jitux.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/58382612197.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bcb865a7f---49879251493.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nmaaepepn2nq1mkggp86to02k5/lepokokuvubibuvipen.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/xazufemageruketofiponujo.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/25347571084.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/tefazodo.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/xokowazar.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160810a5b6c8f7---somapetamudulekomus.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3d51e6924---taxopexonukiki.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/86001242725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=picture+music+quiz+questions+and+answersPDF 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_off0001290f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290F 18252 bytes
SHA-256: f229727ecb1eeb5de87e0bc3eb9ef12ec208042f649f6e21683fbc298d12a710
font_01_sfnt_off000157e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF7 10880 bytes
SHA-256: 1836f4ed468363ed22b7a4b71f53ea6cc9c2520638be51ce598ce5c3e899c054

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