Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a62396db3353d0…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 03:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 449f98abfc281f247690fd99b3043a98 SHA-1: f4deecb4b3f56b98da9fa509f5d1590188f3c353 SHA-256: e0a62396db3353d008f2933b8cffbe4f0904c372546424763aa8cbd26fc22566
126 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 numerous embedded URLs, many of which point to potentially disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://taperagi.com/contents/files/fasosel.pdf In PDF document text
    • http://ckud.handysociality.com/upload/files/bukepunowo.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3d21c13af88edf9e7cb8f42a5b7e3b4d/raworuvu.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/93933392266.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/76319784289.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/rutat.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/80624094453.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/sokovebumitodigomaj.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210914075337.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/senisule.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/85417365360.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/fidonijetofisonas.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/pirasejanewowusozol.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/53696182769.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/kedoxul.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/sozokologoduf.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/zuritogixokubukenigijax.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/23331301733.pdfIn PDF document text
    • http://rideco.hu/upload/file/koforeguveza.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/luvivujo.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kujunugutimafimiropoku.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/32855332718.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/882bdfec94befaa9e0ca7b6f1768954a/zuserixapiwomesedokogux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=android+camera+manual+modePDF 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_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 17604 bytes
SHA-256: 0a9fa319d8bc8aa7b374894608d9aa109e3968ad927582a9e4cc82fd454cd477
font_01_sfnt_off00010334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 10348 bytes
SHA-256: e63a26c70c3a1b6a898c44b0e4ed546fe0872d2eb675847ca33be284716f7b7d

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