Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4d97fb934b6ba1…

MALICIOUS

PDF

86.3 KB Created: 2021-06-29 06:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 817edc099c3d8fd8362d5764785cf556 SHA-1: e970e88ecfd3bf33a2fb3120c3a5a27266a91435 SHA-256: 4c4d97fb934b6ba107e7a81e96e9ce540d888b5731eeee946f0d3e3bca6cf9dd
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a campaign to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/2m83me8n2ptm2afvvlu4ejp168/xemiv.pdf In PDF document text
    • http://www.hydro-tg.pro/upload/file/88106468616.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/16422231551.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/kulaled.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dda61ef33c---nisizemetipezozakufax.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/baguroposixutanoterozazo.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dffa1120dc37a4bde95e2915f150b267/pabonoxosuj.pdfIn PDF document text
    • http://airfa.it/userfiles/file/tazomo.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/libokisediti.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c417429da5f48e1f67fb377c3fad200b/55353595337.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/nisipalegamo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9273543f6---75350387314.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9e7pmck6el5rm9kj36al82u1kn/68026558201.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/31686499101.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/raketawalizogilijipumebuw.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/solixowelikigefexisowo.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/72043962998.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/83840969993.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7d127ebc127b4324d7064994e4c3eddc/95279478275.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/21266295266.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607266a9a6f62---24289712935.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/5a50a9fbaa252bb522ced862e19f8d36/suputijisaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=to+your+knowledge+synonymPDF 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_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 10596 bytes
SHA-256: a7172129dee329e6a0e0bf48adce57079d81dcc82e7da5dea5863017afbf937c
font_02_sfnt_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 19252 bytes
SHA-256: 3144ccc983d0a97e028405926028d68ada6cc70a080fdd3b0940d9bfc839b12c

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