Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8632b15d2c5dbcd…

MALICIOUS

PDF

90.3 KB Created: 2021-06-30 21:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c386f32e8ad105c2fbb7e5df0a117fcb SHA-1: 35b6eb3d7508751341ac0515cd8e24e2df9f5d4c SHA-256: d8632b15d2c5dbcd43422e760007e8ff79ec792b07902b8765461fe7077ad15c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs likely serve as lures to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://pistant.ru/uplcv?utm_term=the+most+recent+pandemic+outbreak+is
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9acd6a644---kosowaputekegez.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8cobfon73negirgnb2e65c3de0/1003944348.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d968128a5e9a8767f7f14ffee063b68/ruwufelajavisevisavani.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/xunijepelafitix.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099cba5bf854---85814386569.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/85b20d72ef2cf94455424deab077b6b2/90694526153.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607046aa457e2---fekik.pdf
    • https://pachetedeturism.ro/images/files/31750647757.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7efe1f4a---turipopokujosi.pdf
    • http://usaoxin.com/userfiles/2021-6/file/pujigaloleli.pdf
    • http://ks4073.com/file_media/file_image/file/beponibefejaparamenevene.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b792b99e4cb---susewegoziverimujimadi.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072508f96b90---21678017299.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd83ced4c81---99224172958.pdf
    • https://htlexpress.com/ckfinder/userfiles/files/malalaxowedal.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72bc13e6a---18960754955.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/6178b6a73bbadea2ae55b650488dbc98/49926870329.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855c54ba46a---puwikub.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f6259ceb0---92835712708.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9fe755a5318549725dfcacc1420492bd/guxekegowanuj.pdf
    • https://contactfm.be/userfiles/files/bamurufuvamanatamudu.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce70e39f71---21945130934.pdf
    • http://mesterek.net/tmp/68969173188.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d3030b56c15---19101156636.pdf
    • http://rilta.net/userfiles/files/13030772539.pdf
    • http://retco.ge/ckfinder/userfiles/files/zizulirovuka.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/43d0753db798ac34361c207ac295d04e/25108728052.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_off0000fce2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 16792 bytes
font_01_sfnt_off000114f9.bin
14630b660e81e74e89ff5e117e6cafbc95c28e45ebd3c3ba0c77437b1616dc79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 11028 bytes
font_02_sfnt_off00012e3e.bin
93a38fc08657ba6116f5b6f2a7002fea57b04fb778922d5d8cf4a16ac9e6e016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 17512 bytes

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