Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2333e19d68dd10…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 06:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 753a2f38c5c57a63452410aa95ce4403 SHA-1: 410f00824e102e70036576c2f0583e506367c6c3 SHA-256: 5a2333e19d68dd101162996f126bce50a783c41135b1d0f1fb3c62c4ef398e03
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://allytemp.ru/uplcv?utm_term=greenply+plywood+price+list+2018+pdf PDF link annotation
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/uiaund73ec9g5v0i3pe76lhbm4/xerodime.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/2ovlm4dsk1fs3lk1l26b38te47/15289551022.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/48192259032.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/1ih0ihs1gqne8he9gnhoo1por0/43908730589.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/4a709c2fd4c69aa89cbf6d28784205e1/tivajixigujoriw.pdfIn PDF document text
    • http://megaeventoa100.com/clients/f/fa/fa03970f5feff24be7017758158681b9/File/mesasa.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/doviworiwideg.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/dabigipetemimefiv.pdfIn PDF document text
    • https://digireg.nu/upload/63494867690.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210824223517.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/a03u936muiks33nhktes7ngq12/jibujivet.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/74530307705.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/sikivopozubig.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/u37cfca8hlvg1el4lb3b7sm3f2/328232086.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/992c78b7403cf2bf543ff6ce1781c16c/69801331468.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb55320da3b---98563160741.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/mealge7d54g43mcutis696j5kn/pigomuj.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/1734633fff7ae0ce593011262ec0c27d/denilazum.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/lalezejaf.pdfIn PDF document text
    • http://nensi.si/upload/file/91217177969.pdfIn PDF document text
    • http://polipack.ru/content/file/90710775550.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3e1fe44d365013d1a269a8f2af1efaa5/28691818016.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/21336470895.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/xivigafakojebezitoki.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/e74inc9qg18f37cusjqj4a9lqv/gumikaletobapobogu.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/gisewagovopelikemisozodi.pdfIn PDF document text
    • 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_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 11192 bytes
SHA-256: 2b1f7cc2c126aa929c947d70b223c8b71119b35246351904fa90c0955100b113
font_02_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 17584 bytes
SHA-256: a98088346dd5d3c616bb9741d9331bf1f631bc74cf5adb7e955b7eebe143bc75