Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3b1cb459ac1ad6…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 13:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22f25c54f8f1ca80657f4006d48b45f6 SHA-1: 741d0cd9dddad0b228d25c737b557cadb057a826 SHA-256: 9e3b1cb459ac1ad6f28ac748806677120dcd6af50aa0b8cd4f21d9c23913d238
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=all+gba+roms+free+download PDF link annotation
    • http://style4.allwebeasy.com/userfiles/files/85874439089.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba450000e2---91080106947.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/bumurideredowavesomek.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/14443507228.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d36f6a19e---76004081343.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/81710726632.pdfIn PDF document text
    • https://arkadas.yuzuktr.com/eskortarama.com/resimler/file/2585803682.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/54238680232.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/24339721483.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/68440658555.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0e78179708bd45fa26894440642dd246/45795376533.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/rudisebapanefejap.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7auhul0f3mmd2khv38jlg6f263/desera.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/wujadefetozuxum.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/juwulokirafe.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/81374551144.pdfIn PDF document text
    • http://cochemical.com/upload/files/65708017178.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/gupokuvuxevawus.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/34105851178.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/35973070296.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/ruzejolem.pdfIn PDF document text
    • http://gerocuki.hu/user/file/37893174899.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/28405828030.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/83553130024.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/20551857846.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_off0000b069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87B 15748 bytes
SHA-256: babefaa7d54067a8f1c12b44a15bb7cb5314bdc5d113a21b4a541ce424de137c
font_02_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10716 bytes
SHA-256: cbf0ef08585786530c9215be601ca815050ce5b65402c768e3714860b4ef0d9e

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