Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fc0f65f599b268…

MALICIOUS

PDF

84.1 KB Created: 2021-07-07 14:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: db21ee755e359def845d823737dd6374 SHA-1: 8a2b057b8701f5bd9500daa1a38f44a3ba2022a3 SHA-256: a9fc0f65f599b2687659b7c5ff6cf65d169619599e5cae24a9a749f278834540
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on compromised WordPress sites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://inwebjor.ru/uplcv?utm_term=income+tax+calculator+template+excel PDF link annotation
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb32d9d93---kewobodirojimude.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/januzufozudaje.pdfIn PDF document text
    • http://scarpatti.com/files/81532868251.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/13112443103.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e3a1d95aeec0f4a52a45e0c84e95670/kigadijurakerozalupejuk.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbd234319---moworoninel.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/7462ebd512a8d8bfad23b8e806fd1626/6526823156.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/44b8r0ug33pb96sm8lv2prpbg6/55535820755.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/ferebitawudokusaxixoduto.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdd6d589b4---38822222423.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/oeroha5qh5as07k2g83q8mu777/nijadedowuwoxeba.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/3b1c5d8cf2e7d3c3301db4282805548d/54869335706.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd52d80a5---wopetupibuse.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b613ce9eed---tigusubajolivebotepox.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/28314311117.pdfIn PDF document text
    • https://ka-base.no/images_content/file/gakitunid.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/88732687978.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847640f11c---49122781068.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/521aeadaf8e72fab5172478828c43513/jifagowavirob.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b567ee38b3e---duromoka.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/2295933344.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/zafipesuk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 10428 bytes
SHA-256: fd7b2b4d15ab3350bffa0c4dd96520b69004c7c84c6156d78cd24daca16f0538
font_01_sfnt_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001156f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 17520 bytes
SHA-256: 47f2471d7afcb6a5f48a40acd7a7ee0b83beca177f555bb06ff5724844ebe136

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