Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fb1977cc3f420d…

MALICIOUS

PDF

113.8 KB Created: 2021-06-26 01:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17e21c7968f42bee34e83e7a14376df4 SHA-1: b975e1ae16962e5c95ecfcb339bc2bccb900798e SHA-256: 00fb1977cc3f420dd3a0c12700892cabf9c7db973a15c7bf288ecbc70ec87217
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier also assigned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

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://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160af82b173f54---59802280687.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079904cc51e7---kudedejevib.pdf
    • https://fotofidelity.cz/userfiles/file/sagoloxanavuseda.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cdc643de5---74796422963.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/4a2e3ea2b528c0419faa4085aefe7a31/sutedakewevadediko.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e51cbc2f---98445998161.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a2a6c721---85880640214.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/evk371qolp8p4jdssn1r21reh2/24827622235.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/c333b014b764a12f59d2cc952a9e03fc/bivesom.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/72jdb5g3a8ut3qnst281qvs9rt/lujufajisoginovaloziviko.pdf
    • http://skikk.nl/app/webroot/files/userfiles/files/jegizuk.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/32c52722708a942a9e75e72a62d4491d/88727064111.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743d6d1b402---xaseju.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/b5b5b50bf6519eecb98e4249c612e064/temodonolovuvosaliredamag.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/6atooc7uorri6ujmb8ne9cji70/94037753942.pdf
    • http://alliusie.com/userfiles/file/pupobelibetevupenuraweki.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb244ad7332---mitozonedeg.pdf
    • http://forter.vn/hinhanh/file/86516534927.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c18c095ba4---85073570074.pdf
    • http://gancza.pl/userfiles/file/kapabefufebevuj.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16075e905354d0---tuzikudepofavanozazapexux.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1426647c84---semegej.pdf
    • https://soalmatematik.com/userfiles/file/zizuwaxora.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d140f152ae---74067609670.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/567721408a901d5d8ef4541118893471/sogatobijes.pdf
    • http://novichiha.ru/pic/file/6874824567.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=priority+in+english
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010033.bin
0bcc2a82c83f2446fe25d838c07d988b793f1a87f0dd9bc437969aabb6c2bf1f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10033 24508 bytes
font_01_sfnt_off00012db8.bin
d75c41e251f9f9743069587e59739fefcdb512460aa94f22e5547f4df54b7186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB8 29900 bytes
font_02_sfnt_off0001729a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1729A 16792 bytes
font_03_sfnt_off00018ab1.bin
0777582162582884013b6af9b1e8ecb0360c75fe84ee4a2d9720e30a71194105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AB1 10340 bytes
font_04_sfnt_off0001a1f0.bin
b1ed88b3317de63d26a2108c7fb37e08982986b0b01328e5cf2030304594a483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1F0 6768 bytes

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