Malicious PDF — malware analysis report

Static analysis result for SHA-256 8107f32d90672fed…

MALICIOUS

PDF

87.4 KB Created: 2021-06-25 12:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa9ab020abfbbbcf6455103828e27dcc SHA-1: d8fd1cca3e74b5909c7884ef1fba8864b61837a4 SHA-256: 8107f32d90672fed9759decdedd9d050e51404a1ba8bc775ebe5260f272e8113
126 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2d47383c6---1556691986.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc33aded86---zemomopaxemuze.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/3774c73f7d001c298ddc7d459dfb94d0/55818846280.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3245ea776a---jiwaminif.pdf
    • https://pima-alarms.net/slicice/file/23407900811.pdf
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/gowolufirodubaveta.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab137538a---26314750151.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/76912894187.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/24185614963.pdf
    • https://fnb-concepts.com/images/uploads/files/10250462692.pdf
    • http://raffaelecavazzoni.com/userfiles/files/42446430233.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/633ad0a9729c07b29c49cdb1e75e0add/mominabikolakepekufubegek.pdf
    • http://100gastro.cz/soubory/files/zilamasawobenofozaduw.pdf
    • https://hasekei.jp/userfiles/file/wibesidigifaxovurekasixep.pdf
    • http://kibbkw.com/uploads/file/87315731501.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b3aab89125efdf46cf7fbc7517500d0c/36397166150.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37f8ce3cc46190302ce8a8a2afec42a2/26105231817.pdf
    • http://skybuildinfraprojects.com/uploads/fisunozalekofozo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=best+acupressure+doctor+near+me
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25a.bin
4aa03de981208326c34fde423cb7fcbcca92db38869f2c57b846b696ca463614		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 17052 bytes
font_01_sfnt_off00011e7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 16792 bytes
font_02_sfnt_off00013694.bin
170a2a64db152b89923c283c8bfecd699832e5eca03deb9892f14e64d0e52d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13694 10688 bytes

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