Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1ba2029ce6a489…

MALICIOUS

PDF

82.7 KB Created: 2021-07-19 15:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 073f6fca0f49f3123de944121bf82416 SHA-1: e53b4514aa7ced4112bc7102b8f2ac9b8bd4b7c9 SHA-256: 9d1ba2029ce6a48933bd5df4471c1bc1e8b54be80588fbcebab637bdb6f8e21a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.deopendeur.org/imgUser/file/1201095430.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3554b5366a3d765bafe8c6e53dc00030/zotozadesakeza.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160960adc1dde0---xetivitunipoxajedevig.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7ce831f9---fupazuboref.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe6a69c732---95588045229.pdf
    • https://hogies.com/includes/template/uploads/file/91557665728.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/wiludokovixe.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce09d5f1f9c---86013130371.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/o75791shag3bsfgst6hlhmna51/relebi.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082edd7df457---93638584347.pdf
    • http://enotecagaribaldi.it/userfiles/files/vapagagogivurixer.pdf
    • http://arisutour.com/ckupload/files/gedevewigupamesupedogom.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c117d420b1b---bojobixasajoret.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608138309b904---37805907523.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160befd878b5b2---luxegixuvikojo.pdf
    • http://ilkyoukais.com/Images/Media/files/32533705621.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/zabiwisalirotupezaso.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855fb556b23---gofezilimosulobokubokafu.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/k5v4fdq9m9lh8r53l17dhdube2/navam.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/liluwawasagosapimulo.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb79e90438---jedakodefizesolu.pdf
    • http://auroraenergyproject.it/userfiles/files/93143915849.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7fa12df0a2---10856917881.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/361f0c2acb1aa7a7b5dbbee7c9b9805c/42042913540.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e755dd5b13---86313441447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=muthuraman+old+tamil+songs+mp3
    • 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_off0000dffc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 16792 bytes
font_01_sfnt_off0000f813.bin
e8df46deff3649b7b4089b1438fd412bcf07361db0720b698d13bd8c5d939eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 10972 bytes
font_02_sfnt_off00011116.bin
9c9d6a2c47eb7621ad680e216d5470662055fcee6e9e1d068ff2a93454999b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 17100 bytes

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