Malicious PDF — malware analysis report

Static analysis result for SHA-256 370da9c56af66d68…

MALICIOUS

PDF

87.6 KB Created: 2021-07-06 23:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2432c14017911411e326f48411ba357 SHA-1: 1e01f4c2b597e201a1f3b381be1fc9026677b93c SHA-256: 370da9c56af66d689daf19e354766cec380596869cb332b003a652f6b229fbd1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fnb-concepts.com/images/uploads/files/72962298554.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5e40db534c138ed4440b180fe83b50cb/betusimamivuburadamuw.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072f932501c8---14723194925.pdf
    • http://dgjst.com/upfile/file/luluvikikajebez.pdf
    • https://bibliothequeanglaise.org/upload/files/rowadozas.pdf
    • http://asianmosaicnyc.com/userfiles/file/xoragiw.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160755cd60434c---dazorabogagilezedavi.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/93471520620.pdf
    • http://bitite.lv/media/txt/122/file/44729958836.pdf
    • http://kursadowicz.pl/Upload/file/65680370710.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2c86d1eeb---gotewaledigijobeb.pdf
    • http://handbook.hu/upload/page/file/jepedudaxikufozabi.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/97732666825.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4009cba8---geridatilojidutijetovu.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160726517135b9---midanofapinepewebifurevos.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/3162e0032435046bee1d178806cb755e/boraxalopikumor.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/87bda69ad0bb5a3b0c6027ab90a7f676/zenikipofokokinuwuxowoma.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/045b490ec71afc80c4e2a9ef0882b055/89913715493.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f2d0ad9604ffd849a297c6cd18ac761d/bofulisedimegiwaremu.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b91f36b719---dukarugalixuwixulexikoguf.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/29dd1572312c26a2a09c608e6ea8112f/woposime.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34e6bdb8a---vanizilulipeg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=investment+proposal+example+pdf
    • 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_off0000f46f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 16792 bytes
font_01_sfnt_off00010c81.bin
35b3e5ac362ba493f675249227604bf684b2add5a6196398a3f78b6c80c578b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 17072 bytes
font_02_sfnt_off000138af.bin
a1b54796b1d313bd08c7c319c388be4fcf70727af3ccb3302828fe77bf6bac2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x138AF 10684 bytes