Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abcc9852bab932c…

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 20:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 580a640b0d19e32ae64389513ec96c70 SHA-1: 6a73cabaa4d62da99de563fecd747eacc3db50a0 SHA-256: 0abcc9852bab932ccb6128d3298258f0bf299b209896b13996fa9814a7caa96e
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a lure to redirect users to malicious or phishing content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e29cc099---folenunapajekedokoxumuxag.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783f91322f3---vokekonuwigelelodubanuw.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b73a3747b---66866089272.pdfIn PDF document text
    • http://parentini.it/userfiles/files/rixigoxapirifotovonago.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa065cf236---gekipovuk.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/rumubil.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/73417086858.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/57474107827.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/ledoba.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092bfec3fbe7---bimebobaponizozodana.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/xolegirebotape.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/5487665011.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/94974071819.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d401d8a87d48646d5c13f2d94642bced/66125811897.pdfIn PDF document text
    • https://alariel.be/userfiles/file/tubofole.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e89a1bca3---motelumorejunijod.pdfIn PDF document text
    • http://jngf.cn/files/file/62357073884.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/nijawenebimikuxoraguvunat.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/95579527240.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/daxeno.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/39020027761.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/fewedukam.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/malaxekiwolovasapovarel.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/2929cd67694e73cfc26dac825991c238/sovaje.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/79845293030.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/66ae6e6364d646d0a4df4e70e645637a/lasazudiwujomunukisesidi.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c130ba12c---vamibozij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=defunctioning+colostomy+meaningPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 17868 bytes
SHA-256: 122bfa4c4f306009b6eb742c03ea857a86d54e44635b45b5adab07368c744ed3
font_01_sfnt_off0001109b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B2 10792 bytes
SHA-256: 0a45224f3abe2ead728805c26f6ea20af8295be6b8a2af08d7733fda2f36950c

Open this report in the interactive analyzer, or submit your own file for analysis.