Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8f246fd8d42adf…

MALICIOUS

PDF

93.4 KB Created: 2021-07-03 08:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2e20bc80f23816b3288cf3bc39609148 SHA-1: 0377a47e46130502472fe460e9cb88010cef7d9b SHA-256: 3f8f246fd8d42adf69438f1bad7fbd791a58a3550ce3203c5c439bbe032c7c23
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers strongly indicate maliciousness, and the structure aligns with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://vuatoyen.com/uploads/userfiles/file/jamobegibejes.pdf In PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8c127a45c---wevetuxegibe.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f3b86bba7---molezepidobarizup.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/zufonen.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160879ec11245f---72554101841.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/84984078644.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ead4277cf1---basolonivob.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/vorusixudazomatasozeb.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16072fbcfb514b---zejelebirupides.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/bujobepivawes.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/momuxuxulo.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/70595489012.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042b2063a9---76586594643.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f74199918---rawaburedezigepimatir.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/54694ec4dd3fa0a9d8b691ef217c3ca6/xavunufi.pdfIn PDF document text
    • https://xn--8--clcp3bi.xn--p1ai/files/9837393033.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d1875c1481df5ba107aaf814c822fed7/depewolemedatetewuran.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9834fc7de1---73412901752.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/jitulajegalirupiziwido.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82ccb9070---ripurufopilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=astronomy+activity+and+laboratory+manual+2nd+edition+answer+keyPDF 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_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 11232 bytes
SHA-256: 0ddaca177ebaff2bdcc9d67b01f35e123dcc8b5fe5ec582c092d2d4c7a7c6694
font_01_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 18332 bytes
SHA-256: fc377a6d8f8a08b98ed8490d7e29752413d96e67123e3e7ce5b7cfc6641f1b10
font_02_sfnt_off00014e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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