Malicious PDF — malware analysis report

Static analysis result for SHA-256 10806a131ad2c437…

MALICIOUS

PDF

91.7 KB Created: 2021-07-13 17:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04022a13cef21242f2cf48b91225ef0e SHA-1: 28b6d569eb690bdeeef1ce6ac0e4c290755f5820 SHA-256: 10806a131ad2c437ebf66496a44512d89f7c00402612964f1f90ef02bebb252d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS upload directories. These links are likely intended to lure users into downloading further malicious content or to phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906d1bd9660---15178990425.pdf In PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/73115a55079efea97c2dd743b64a7126/65713552549.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d45f463c7---34204389495.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c68fe1d0fe---wifonomedefiwukinofopas.pdfIn PDF document text
    • http://www.celso.org/download/liribozuzemosapesigon.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1b6401381744a1f8b1f5e3c4a3566717/tenufutuzumoxokar.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9e55c94f12be4cc0a4326648135739ac/bupizonomukemovomegevixe.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/nujovokemukapikadoviv.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/zodefogugagorujasuj.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7847a0aa3---95946123184.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/zejuje.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/10579b01bc9c994e5a01eccd2832dc98/7675045483.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/17027936418.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9e17229d56616807625c190333deda5f/vujigi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ccckjt5e6mh0h5m4j86c18kje0/21081795679.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/guzokujeferotakunefatinu.pdfIn PDF document text
    • https://campermagazine.tv/public/file/jukifonime.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/zajogalonikiloreremura.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d5abe3893d9d19b93f7033548ae2d26a/gakuxidonumilovuki.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/64905060674.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/u7omd24psipi01ep3kubhna06r/1310895561.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d80a9da368---82637675437.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/javebodudopeg.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d9400c91---76961391197.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rafinemufofineroparu.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/50897554342.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=black+stool+meaning+in+adultsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 16540 bytes
SHA-256: 9ad45cfd69627e3b9e316e553b3e779ddf0cfe14918533b1f386fee1ebdfba40
font_02_sfnt_off00014847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14847 10856 bytes
SHA-256: a3cab0b93aada306061c76a7ee5402974e795678a74af379ddbfccf1d82e15b5