Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dabd0a2247edb53…

MALICIOUS

PDF

59.3 KB Created: 2021-06-19 08:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c98b429dc7d9208d3466cc304bb83c92 SHA-1: a5f0c219571dca6a5cfa3b5bc2e3443b5d5b68df SHA-256: 0dabd0a2247edb53fef3aa208aded61cd9a288c65c6254725e4e09fbfc53ae97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=mickey+mouse+clubhouse+everybody+say+oh+toodles PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sigqurflcphr89l89afqtme947/86585034024.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732b0ebcd12---sukejo.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/16444cd91fb55ee85f6fd9cf238b1543/55943302121.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607035844bb4b---litetaripa.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a821df5df---jofonoponove.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/dufis.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090511631c6a---73747747546.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/kidiwelaxerujamenatafad.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca5f2cf10---jelozivapoxuzenat.pdfIn PDF document text
    • http://esistore.be/userfiles/file/daboxasasulomajojezeb.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa5c13191c---remekoz.pdfIn PDF document text
    • https://senfina.top/uploads/files/wosojibivawonuw.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c30888ab044---zisek.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210614_1ED8F5FE24B453AE.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/msejf739uo5el5cgkvoeqitts7/57894310610.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060817283273499.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746f505fbcb---10513779013.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940bc7e751f---66604734844.pdfIn PDF document text
    • https://artenika.pl/fck/file/dalugakabesogalebazi.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/loxonuzewuzotafezubefuruz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8E 5552 bytes
SHA-256: 0c4b531f2e271eea4fd0b5763ebb7870024a2fcf0d529c34900cd1832a0b8b59
font_01_sfnt_off0000c158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC158 9064 bytes
SHA-256: eb2a6d0e29ad4a36fdfec6046e1f72781776cfd8eb0fd435c1fe0743ef50ffc1