Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6717b7b885f9f0c…

MALICIOUS

PDF

103.9 KB Created: 2021-07-08 09:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f416d0eb78b002bce97113152f884783 SHA-1: 0d4e7cb41acfc850c9c2fd635948b4c76a99ce8e SHA-256: c6717b7b885f9f0ce1dca9aa565bc5ed511fc7a3969a887ecd0076de5e419792
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the PDF structure itself suggests an attempt to exploit vulnerabilities or lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://philabc.ru/uplcv?utm_term=intuition+in+english PDF link annotation
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f934994b96---86823316895.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/wivelegamilokezemexonexe.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d74ddb1c0c47771b312405d28f2130b0/56100646262.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073745e9eef8---misofanowefivebedesoletom.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0f153e2901af26a61b000ad4f02c2099/86022201912.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/14864152341.pdfIn PDF document text
    • https://x-software.cz/data/file/lalipagiwexeveda.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///6497619214.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b186474729---dozosefex.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/kunenusidululet.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160928b7d662cc---fujakepifidonadodeseki.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/riwipemonigoxaloj.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/756ppvgt970t23prgqe02vff9k/gufiluduxaturonuwoz.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e63e369a6---51656666367.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/48677949777.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/nizanegoto.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7d7d9789b978e78952b073ccbd1e6df6/bunowemur.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d59fa945ef5ede046017cbaf26aaf203/60181599371.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/nubuzaxolewawotewid.pdfIn PDF document text
    • https://filetorme.com/upload/files/nadoxutijuzasamujusuluri.pdfIn PDF document text
    • http://wami.cc/data/files/23082723962.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/1meoocr0ol5493aes7k7e65g9q/vepuju.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d948d32b8c---xepugef.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/nufebazoxa.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e50e249c32---35019986710.pdfIn PDF document text
    • http://medlab.webd.pl/upload/file/zawufuteratexasa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 10176 bytes
SHA-256: 8f0c11bd59b196c623f0d1c743c65da19730904899ccfd56b7f50bac73fa538e
font_01_sfnt_off00012bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF7 16452 bytes
SHA-256: 935e080d2693d83bb4e3c510827c91c159065c387133752280b470824dfd2fa2
font_02_sfnt_off000142c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C5 22136 bytes
SHA-256: bc5d6eed475563ec86b41afffe9e565153922f2ad9e54f1a496f97014986d14c
font_03_sfnt_off000179d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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