Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065ff8dd9e5b861…

MALICIOUS

PDF

68.5 KB Created: 2021-09-17 08:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 805a57a864375e625f6663f1eefa2ba6 SHA-1: 469ba5911d0c6533eecf4ca3266b59230198e836 SHA-256: 7065ff8dd9e5b861819df7690d007e75c7ab6d089168fa307a2c66e6e5d8b348
126 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to disposable domains, characteristic of a link farm used for phishing or scam operations. The embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://baoveantam.org/upload/files/58407506667.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/e090ac35b72eb05fa82adaea9c9f9e1f/tanoniwej.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/f5d3f9f95b88b3d0ac6b35853572eb5b/runosaxadotadowoku.pdfIn PDF document text
    • http://xtra360.net/campannas/file/67029032514.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///45341430931.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/jixak.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/zubegesa.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/gimak.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/kijewogulum.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/76910725711.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/selomewovuj.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/musoduzerowezivuko.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/46301954455.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/4639001301.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bizexowalaxoxata.pdfIn PDF document text
    • http://sinostandards.net/upload/files/kiboxed.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/8915786000.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210913221010.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/tatomurabe.pdfIn PDF document text
    • http://hanifeugur.com/image/files/vugusozidabirirebuk.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/tufokol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=7+types+of+radiation+in+the+electromagnetic+spectrumPDF 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_off0000add6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5ED 11232 bytes
SHA-256: 2542d19f98d2d6bae8edb37738057595dfbd749fcf08af56fe5cc0dc6344d916
font_02_sfnt_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 14592 bytes
SHA-256: 40affa546946c5e2e0622a22ff812664b1432dc7a64fb11e41f23a8c1b639d50

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