Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fee1a94713a91b…

MALICIOUS

PDF

73.2 KB Created: 2021-09-04 00:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1412653be74cc8d6af3a39754eaa2a0a SHA-1: 3db29de54abbbeb0a5dd2622e6f8ec5a8660bfc8 SHA-256: 98fee1a94713a91b2f925d74c051f5d820ee7d05ecf24aefa9ea250aa6e7ca1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

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://garglob.ru/uplcv?utm_term=honda+manual+transmission+service PDF link annotation
    • http://ltptech.vn/uploads/userfiles/file/96204676150.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b85fd7839---75731801127.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/21764780583.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/31388167785.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/96415441316.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/41169541445.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608477921cf09---dowarero.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e844cb40a7---47924880525.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc561694ae2b55ca6405b46b7f2a01c0/watitawepukulekero.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090969d0e64a---34615643961.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/poraxamuravomojagisejuzo.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/d2clm22b4oetuh9vcr5hvsta9h/96675810322.pdfIn PDF document text
    • https://kristinanamaste.eu/files/97155616739.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/5qra4gik8801du3igt79ofpa7h/94210707919.pdfIn PDF document text
    • http://ativn.com/upload/file/boxawenalugarawikitodaw.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a59c98d4617---ginotedu.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/8034515575.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c3463723---30082749022.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/82280201094.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f9784b2f0---20412678173.pdfIn PDF document text
    • http://voijin.com/userfiles/files/33430935898.pdfIn PDF document text
    • http://konberdbio.com/upload/files/zaposov.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/304a26341367a0451366efcf058746ac/wegawudug.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/67333788386.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/8411cbff0509af8fa83c92448ba55f24/96460620585.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_off0000bcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD6 10688 bytes
SHA-256: 5f399db77a609611f2ca417bd04115a2b128b713d0355f6ddd6118ada4ece8f7
font_01_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 16304 bytes
SHA-256: df62d8b6a9a07f95f1818c79cbccca13b3b3169c160600cddfb6ef056fa4bbea

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