Malicious PDF — malware analysis report

Static analysis result for SHA-256 70388cbbb7c9ade4…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 02:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d94c37b8e7189259ec71d8123e771f9 SHA-1: 563c93284699a31c207ed5b5a3c551d16d6128e1 SHA-256: 70388cbbb7c9ade4f8e476e83624d966d43d0e5aaf2c9d86b4805f08ddf60524
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ajitcoatings.com/uploads/tedimadofikepat.pdf In PDF document text
    • http://dawahcity.com/userfiles/file/39528665822.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/pewexagifesos.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609f95601a843---delarubenajizexerosezodew.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/56481b4f22333647a4ed719c8c9cd8d3/jugepanulaga.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/guferekaso.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/926f9dd4c7569542d601807648a62cd8/bofefi.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/64072554535.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d325c25ba2---37611867651.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/folomol.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076911495397---89889423252.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/pavumejek.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/verofitelozupumurusirawa.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7e19b886---99257729789.pdfIn PDF document text
    • http://gaudi.tw/upload/file/vitimodasekej.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/patamulilunejizejixerav.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/tixudovebetisovuwu.pdfIn PDF document text
    • http://reichspfarrer.sk/file/mizoxagawobefiderufa.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/9460806c7f60bca3105843c1ea1430bb/62817566395.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fa21b8e38---14884373516.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/89567745293.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/3137529174.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/up6ovgojv9vak9dpgqsj7th429/77224735651.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8f921c7e---56100090916.pdfIn PDF document text
    • https://breedlife.com/upload/files/30649557985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=convert+ppt+to+high+res+pdfPDF 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_off0000c418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 16736 bytes
SHA-256: c9eddcf62a16a886033cb9832e7f7bab303ea92dc87604de1fbddbae6cb96231
font_02_sfnt_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 10668 bytes
SHA-256: d53b956be2aab64c4b6f9c2acbf6918f5f980d8f7f4c91d5ed7aad1f9994e8b9

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