Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade6e8e9fbad78d4…

MALICIOUS

PDF

79.7 KB Created: 2021-09-11 16:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 11eb37d754af3d2d808aa54cc3e76188 SHA-1: 195bd68c65f5f85ab043e6dba20b56f9fda13194 SHA-256: ade6e8e9fbad78d45147d641aacf3540fb6b08d8afb54cbc184a4e0a160c640b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161336178c4fc0---49960396261.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/a1fuhhl511tmr7vh3fmci4hp8o/rufowijexavodumekurixeg.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/16654296424.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/60489629598.pdfIn PDF document text
    • https://binhvi.com/upload/files/xonekin.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/vegesizararuvorabefatab.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/xawisulajuvumok.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/20237760554.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613121bb30db8---jesulivuvajamolajawuxemu.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/56724358431.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s27je8it5d5inkrkb0ccbm9210/riwavuvu.pdfIn PDF document text
    • http://wdnederland.nl/file/62048954677.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/98787038560.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/disesajegadiv.pdfIn PDF document text
    • http://poiskvod.ru/images/file/36370180573.pdfIn PDF document text
    • https://inarsindbari.org/uploads/lafifozabidotedexakuninot.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/86238895778.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/durimikuzilowawivaje.pdfIn PDF document text
    • http://fourfoods.com/images/files/rexunulore.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/8071157048.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/samosi.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/jepiku.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/pomot.pdfIn PDF document text
    • http://pronobile.de/catalog/file/xozokitan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fake+location+without+mock+locationPDF 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_off0000d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD340 17672 bytes
SHA-256: e42514717d9ceacb159aad799c1d6383a34d842161006c7ae7ad65010a508bb9
font_01_sfnt_off0001010b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 10484 bytes
SHA-256: d25641cdf4a7f0b7a5b855b52647083d22d332f62c76d597e997895a5425daf5