Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c96a823f6fb46b…

MALICIOUS

PDF

98.7 KB Created: 2021-07-02 02:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b04fc5d8981cde6b64278e60070b4819 SHA-1: cc302201d268113c7adf0420046793323ada5653 SHA-256: 60c96a823f6fb46bf351b1c490fc38869070fe75df4bf71410a96f2bf27683f6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised WordPress sites or disposable domains. The presence of 'utm_term' parameters in some URLs suggests a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://queure.ru/uplcv?utm_term=ecological+systems+model+social+work PDF link annotation
    • http://dgjst.com/upfile/file/37941116092.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160732e1770858---tujuvigawuziwoxin.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/ziretun.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/46940557212.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/39298406910.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b443af09c---vutavizizen.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d5f9b8e7---lelorinapixutubu.pdfIn PDF document text
    • http://feast.to/upd_file/kikatir.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/fimabatogusoxunab.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e578509b8---11263291336.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/lo4hbgkrij1ottqnf5cim1dtt4/15190314901.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/tapidobunalozopoxopo.pdfIn PDF document text
    • http://slsnn.ru/content/file/silunanevukerajodawib.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/da9qq9na72u30tnm8c3e7e5145/kivigubadidilifirido.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97930d1e9---miwujaruvojedemuteberesa.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80acf221ba---nukajosadojigapi.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724d1540254---65199617582.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cab1d289d81---85684103643.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5340b5f7ef0485849260a3c21702eea9/76090363253.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944087050a6---77655452572.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/81541877963.pdfIn PDF document text
    • http://accronline.com/userfiles/file/dulowojon.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/25592295813.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/26456506846.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_off00011ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE6 17284 bytes
SHA-256: 84c379cbac2cb29d8c91d11c9f2c90f8b771f551311bb8a62a39de4cae904755
font_01_sfnt_off00014c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C44 10884 bytes
SHA-256: 074ccb2be9549772bc610e0f80807b38c9fe15f60304557d0b30d969bb60be3c
font_02_sfnt_off0001655d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1655D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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