Malicious PDF — malware analysis report

Static analysis result for SHA-256 e257926ab2339c89…

MALICIOUS

PDF

91.0 KB Created: 2021-07-24 21:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 822f0638a6f0b19c08d46ede1e81e513 SHA-1: a2429e49a053bf228eaace5b14aecd9020066e7c SHA-256: e257926ab2339c89a876e5778e3982a31c67dfa796f6d831fdd4cc4523cb76d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the nature of the link farm suggests a mechanism for delivering second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0caea8b127---33277119256.pdf In PDF document text
    • https://ikitellirezistans.com/upload/files/ritasavidinoganenoziva.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ae2ce18b83a711260b1f8f8e20b81e30/dumiwogelebiwo.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/bufetemopojokeduzafito.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/212e17f6af71c94acf7b729edf163ab8/ronoku.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/32869461519.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8f5c1cdb61bbdef95e21b6ffa9f82b80/98059710350.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/29716040825.pdfIn PDF document text
    • http://axwelindia.com/uploads/bobudagegir.pdfIn PDF document text
    • http://strandedtattoo.com/file/wiwix.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/s5ooqtmd8b3nm3ko0hukjc36v8/jijawemawulelefosoruto.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/eb4bd52eadef4eead156ab6800d10aea/wugumexesetonepi.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f377b45efe0---mekepewivaxejesikufu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7bab4ed567bff07732bc5a7334ab920b/50741542581.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/vaxiwikimewebipofalevu.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/nafufetikodovaxoselusezo.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///wopagasixivopapo.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/dimivopifunoka.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/sedidozolimazugupe.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdb9c9278f---borabisinoxavalazomogis.pdfIn PDF document text
    • http://vodnik48.ru/content/file/60865367266.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c7c5b459e---46321147963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+create+a+budget+using+microsoft+excelPDF 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_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 11236 bytes
SHA-256: 23d37e4773c201a07de65da8d14cc0132b3bc4c48b28c19b829b5baaf0b5685b
font_01_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 17512 bytes
SHA-256: 5b336a510e86cb852d3bfd895afd4b9f38cd5daa61dba8cd00f3d9455a1b21a8
font_02_sfnt_off0001451e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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