Malicious PDF — malware analysis report

Static analysis result for SHA-256 226430c54850448a…

MALICIOUS

PDF

97.8 KB Created: 2021-09-01 11:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 758fe00fb0c649621a92e6ffe612e765 SHA-1: c0d43e18caf58a834a3fad2f7501cacc6d36e889 SHA-256: 226430c54850448ad1128cfe7d2e2316d8a2e48901a25fbed3a47a815e5845ed
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The presence of numerous links on disposable or compromised hosting suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://vivo-mebel.ru/upload/file/82759461015.pdf In PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e729f926---3202766313.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/98855417551.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/8on0uraph0u780jq3j45b9vcj2/43985314299.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160845eec68e60---legiv.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/81138786672.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/30234074237.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/rofaladixip.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/pefomafib.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/c0p81f76k12lq166ol80h6lg40/59436157269.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/94114252618.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210827181731.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/46428249980.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3bb429334---24618766481.pdfIn PDF document text
    • https://defaico.com/d/files/gojubafojakik.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/gavixuk.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1707d78297---disawu.pdfIn PDF document text
    • http://skomi.ru/img/files/file/wajanora.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/nimusegipatufegedalujivof.pdfIn PDF document text
    • http://anupbolivia.com/images/files/70906615317.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/napaxedaxabojubaxum.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6aa9827706---51970923546.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092979384416---65821052675.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/tegilukugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+business+ethics+simple+definitionPDF 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_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 11016 bytes
SHA-256: 11dd439e5642282565e4815049e17da4053546b3cb35047d913b411e4af720e6
font_01_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 19268 bytes
SHA-256: 7650a65e003c9602db2c128afb09c758b5b4a96efd5e57fce1144c945ff0e2ac
font_02_sfnt_off00015fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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