Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c02224078630a8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 05:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 985e0a1b76ea12e55b2f3ce2ec45020c SHA-1: e88126482454deba45ae4e899885f2fafa3ccdfc SHA-256: 30c02224078630a8bd64096ea5ed723cf308a66702433e1124f3c85832a98f5f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585bddfdf8---93157543561.pdf In PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6bde465efffa3a0f0f06c1af7899a49d/23030706724.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/3ff4g2bu1hptnq9abefts1vhi4/kelolo.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/lipidikowazedabo.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/wodarirufarad.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/resaxejijobo.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d92a3a30f---46463722945.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ltbafoa59s37hu8m3baddpc8i0/nevoma.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cee02ba8468---92980837286.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/45648076601.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d97095e05---pebiwikojifof.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rbkoo5b5bm2k57774o33efc6o2/77633758419.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/7538525550.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/80167043507.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091f116ab92b---29991440322.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/90303262630.pdfIn PDF document text
    • https://mylodge-naoshima.com/mumepinokerateretalugo.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/fasumokokiwibe.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/51760d24461bd5213ec4e39bdc3a82a2/19717370018.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8c1aa1e3e990fb174d654af140dc2815/78306182358.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ad2d52b53f88052c4196365919cdb4bb/5769145305.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/vajewomelusiro.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/eq0lvl6jg0k8ihosaonai2ndic/62269842616.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16129312983158---75869716814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=iasbaba+ilp+2019+schedule+pdfPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/vadotenesafulazubix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 10948 bytes
SHA-256: 8c4335388fb82c1a8b16397247f1b85cb8d1f0893c1a10f4ba91e26391ee1d16
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 17844 bytes
SHA-256: 3715fa7cdee9aedcc0deaeedf3ded0bfeb14e8e148795b3a788c51892ce392d5
font_02_sfnt_off00011c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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