Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76c7b1c0c961b9b…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 20:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3076aa309f2164dbe8e8a554a5585d3b SHA-1: 3b6ef421fe9172cb99d1053d664754895ebbe6c1 SHA-256: b76c7b1c0c961b9b68952033dba1f63391ea4a56203eb11b8fc678405ebb110d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=ipad+air+price+in+pakistan+2021 PDF link annotation
    • http://suachuamaydemtien.biz/userfiles/file/nanezixagusubemolimeluno.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d617d71a33---37025271605.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/jibonunogozodo.pdfIn PDF document text
    • https://oferta.lt/i/File/76898572331.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/62632230342.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a3ee4eca03c6af3750436ac43b30819e/59538201543.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/maxodebitexakelosewubat.pdfIn PDF document text
    • http://afslab.asia/upload/files/62362921885.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161337ec28edd8---xozuxuzuwusugajaxumageki.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/furuzowufepesemoka.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ef48e3bb2---bufiximop.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/71631508813.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/farorak.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fdb63265ab---80026051101.pdfIn PDF document text
    • https://unitjaya.com/contents/files/gebugi.pdfIn PDF document text
    • https://renteci.com/imagens/file/91919939675.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/883478695.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/77894843278.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/penudutagonoweju.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/71995395323.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/kedejilugarudopirisu.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109220244098473.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/mejew.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/zaxuxabokesi.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_off0000b299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 10676 bytes
SHA-256: fbbb0ec28eda22183eae62a4d84bcfa9631dac92591afa65a01079b2a7a468f7
font_02_sfnt_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 14800 bytes
SHA-256: 1c10acfe2ab78935eb3da0ebbee86d945be7f95bdbf0dd8313e5fa66dc0a5cdc

Open this report in the interactive analyzer, or submit your own file for analysis.