Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a035c13fcbbeeb0…

MALICIOUS

PDF

88.3 KB Created: 2021-07-01 09:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 200a6a39e8000f2a7d6b7ddd1ce34342 SHA-1: 4f184706b4b866d55cb4840f0f6000c7ca5882cd SHA-256: 5a035c13fcbbeeb085596ce7063bab20da99a76514b8d26a391cfbfac6697b43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nomylo.ru/uplcv?utm_term=falling+for+innocence+ep+2+eng+sub PDF link annotation
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/4016f0623f65ecbbefe4eff8b35fb091/wewuzewinitozobezomo.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ute78fgcdik4vcub40ddl7httm/vogimipomisof.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160764cb306266---55957278956.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ag9eqiva04ekj1mt79v58gc4m7/94944958636.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/popije.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/70692216826.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/demetutapitefudegoxamazaf.pdfIn PDF document text
    • http://uci.ir/userfiles/file/ziwutufukemubulen.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7fc5f2e0fd4d3f7f30c3fbf499002607/50679654176.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210517073246.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/filitumegu.pdfIn PDF document text
    • http://belst.by/upload/file/wogagisekukirogiz.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/bejokivi.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/17629656231.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db72ce81b0a---83466837694.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b981f71a779---82635207258.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6dc5fef54c---daguzelemudul.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160866a9ec5fcc---sorumokotanijixamo.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/790717ef1b4e1b2c27a75709836dbada/xubitamimasexufeko.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/5373991156.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b32a8bc9e---82764654141.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bacce9024f---fasudeto.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/0e9938e095923463c13d6f046b9353f1/51142795154.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c70e8eff3---39779880535.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/43482770998.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_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 10896 bytes
SHA-256: dbfb7e1f74c16445e58adb34c5e7756a8e7d5141813695147f7a35f7e1144388
font_01_sfnt_off00010696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 24760 bytes
SHA-256: 2edd5dbdc1cab3c82c17688e36c83e3921adeaaae881917c69f5865f5913ca9a
font_02_sfnt_off00013b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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