Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d54fbc220db6b6e…

MALICIOUS

PDF

73.8 KB Created: 2021-09-17 11:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1716b5424455df4a2a5f6535350b799b SHA-1: 1cfeeb3a89bfed141fa9e4648483cfe08803930d SHA-256: 6d54fbc220db6b6e3769605110939964599d2b505ebf0c0784e34fa500701896
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to domains associated with link farms or potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/gunijevogefiraj.pdf In PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/mutiv.pdfIn PDF document text
    • https://kopari.hu/files/file/kokojirufo.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/gokasus.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/fitupabovawulijak.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/lofidikoj.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/kuwidanugusurisajewerub.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/10837806129.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/4383950467.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/xasabolotireveba.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/zavajes.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/21978976636.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/dopezejifit.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/2291faa007ebc6906a0bf65257ce5555/powaroduselugifasasanema.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-13/20210913192246498664.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/xusedufepuxa.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///34110514190.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/80309348497.pdfIn PDF document text
    • http://geasit.it/userfiles/files/rutijumulanedojiraravi.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/63339706338.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/sagutizisetenefizexik.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/34306529473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=screen+share+from+android+to+tvPDF 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_off0000bee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE9 16308 bytes
SHA-256: cb26f605942ce8d8d7611406196d529e331b22da23b86f7445b1e481da832c57
font_01_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 10836 bytes
SHA-256: d2cb31bc26c397a183dec3bca155c670f6cd0844a281b014e31d8117c45be4bd

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