Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4c9711746e2389…

MALICIOUS

PDF

71.9 KB Created: 2021-09-06 15:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6590c17caf52b5794df9c24b537dd87c SHA-1: 001c411b30f38256e56aa9d05018ad8ae4c24acd SHA-256: 1e4c9711746e2389d94de1c734d37fdd5c55b88678e400addc1d702a03a9105f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the true destination. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6686

Heuristics 5

  • 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
  • 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://dolnoslaskialarmsmogowy.pl/imgturysta/files/2932647189.pdf In PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/71401215660.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/kizerurorigadalifab.pdfIn PDF document text
    • http://chamdure.com/DATA/files/rewiweduleriduxosapete.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/rafexefazutov.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/73762019209.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083e05152486---rigamezaluzal.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160823dacabc7e---80830892020.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/66604185101.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/99819699750.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/45871524750.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608526e505f44---wiser.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/25832733680.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730f9104590---21605205683.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/xinunidugojinadazevojo.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210707_014519.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c17b2928b---vibusu.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/vozuxebemenuperum.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/30998100883.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/84567467855.pdfIn PDF document text
    • http://susutour.com/userfile/file/31836759908.pdfIn PDF document text
    • https://hidropomp2008.com/uploads/userfiles/file/popazodizujatepobesif.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20218211022545698.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/vqj6fm2g0lrk84rqqjip60i03i/59203134383.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f15a8412---legizibigeboxifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cbse+social+science+class+10+question+papers+2019+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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