Malicious PDF — malware analysis report

Static analysis result for SHA-256 297e7b24c64909ac…

MALICIOUS

PDF

87.9 KB Created: 2021-07-08 12:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 96ebd43232ff0c3251fde67af08e11f7 SHA-1: 083bdbb46e50e69f727b1ac8190a0e6edf1ea9e6 SHA-256: 297e7b24c64909ac12f715c099d279b4492cb399029245720c76dfc95e7c17a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing numerous links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The presence of link farms on compromised CMS uploads suggests an attempt to distribute malicious content or phish users by leveraging seemingly legitimate domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888fd490095---nisupabexulijo.pdf In PDF document text
    • https://actor-conseil.com/files/file/94882113244.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/liwujetakufutew.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160924e2435e70---99880001779.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c92884d226ac824a4c658526112a9e5e/vixawekeposefipoxi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/58728911302.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/b0c68a10ea4ccf432de108b87c83ac89/73013468766.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/tawalivu.pdfIn PDF document text
    • https://ancoraeducacion.com/images/59496716608.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872077d473e---bowidixuvazarabalovuke.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/mezanibogujananefa.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/34169167356.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/bidokifavipinowukeg.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926005b92ab---51095486256.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6996768db3---16854439265.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/39dc6283ca079abb31b9d60d4aaed005/34546418595.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/38016270073.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4356641bc5---kanib.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790f5f91ea6---roxipuro.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/pubewerigikodod.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/zixukej.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/finixinupisuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=christian+names+for+girls+starting+with+sPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8A 10776 bytes
SHA-256: fd98d85e2e81f9e7fed5af9b4f99b85481987d33f87145dfb669ae6d0eff3a7c
font_02_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 17344 bytes
SHA-256: de7caef38ae5eeb8997c6a13ecdefd49b173e02f2c138a2f6e763a180314c65f

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