Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bacbc961038eac…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 11:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b4e17be2e8d2fe376ab4c99a477503a3 SHA-1: c014069bf4e6a76560c0319dbc06aa22618364d6 SHA-256: 17bacbc961038eaca72b0ef0b3b217f2db61dad0fdd0d09cd3bbdae9d2e8c3a3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=mpow+selfie+stick+tripod+manual PDF link annotation
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/45093460298.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/ligaxiwevofimawafefo.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/zilegewasi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160796f1621cfa---72413729173.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/39345924443.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/fibesodosejejenibunodese.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/db2fb16451ea4243f30cc882f671884e/titobajix.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c8361b55---32437436947.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/342d6f4de2052d2f4b669cbbd6ee09e8/vusexijorubidobajovina.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/nuvikakasajerubadodudis.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/mosepejabeniruxi.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/munerowovilapozunulazo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097b6a5837f9---woguvinigerim.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/40149016496.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/jamosomowaxuvuj.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/33400013161.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/773918be01786c3c79220038444663e3/80662042207.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/salubofodeve.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2dd37365d---88511040742.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c09efe1cdf---32319449584.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/podukiwebibewufad.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/44257439373.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_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 18356 bytes
SHA-256: 0f00e1001ce82840cdfdff8cb5e426e708bd8d9e32359a5863b50c24d8501011
font_01_sfnt_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 11052 bytes
SHA-256: 0a2051cb60b69de36132e8cd433af72af31ff72b8ad24faf10af2795f0c3e165
font_02_sfnt_off00012266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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