Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0f1f6701e9c88…

MALICIOUS

PDF

75.4 KB Created: 2021-09-06 09:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c3c0a3b6c05c69621ce08efca424bee1 SHA-1: 4dedf8e9c7f58d3a60f0ba57e2017580b91e5595 SHA-256: fee0f1f6701e9c88e8f040552496c1244e31660b6cb0d9f0857389109ccbb7b5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS uploads or hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aromaonly1.com/yamituki-n/uploads/files/92200497933.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/346df9522cb6f5849b5dc4f3e04a5e5b/17427730912.pdfIn PDF document text
    • http://xycrusher.com/d/files/46107037752.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/nolamibofavevefa.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fivoniwimisefebuzegine.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/magajudi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee6d35a1a---69352939436.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/sijev.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec553cf897---piziradagodabub.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/puwonuwidut.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/07b4e0fe7d362d4b557bf97daa377d42/petutuputuvagepaju.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/h210rr9pa83mk1l9ol13v7rge5/93866888464.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/87f6cb6e6fe4cf4eaf8c2eb9720e8b15/55372265421.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/rosarevipatiletuti.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/20177967704.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/96ddb0481fb44cb62af7dcb46068f7fb/58958748735.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/pakunugosevuzatirabepomi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7c61b0fa5---16369657482.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/pebewidobusik.pdfIn PDF document text
    • http://thecreditcrisis.net/clients/73966/File/67302983489.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/30238358966.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/kimumododuzuvoz.pdfIn PDF document text
    • https://etadelloro.it/images/file/nibolonine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=dingbats+game+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

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_off0000c25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 10716 bytes
SHA-256: 8ccb453807dd4b41c1d880d334c7a5488b779b6df2fcc18462e94acf176a28e3
font_02_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 17848 bytes
SHA-256: c1b9b2d6170d4a2f1d2596fcb795434ced32e5ce3844c3b7e82981e35bff2df3

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