Malicious PDF — malware analysis report

Static analysis result for SHA-256 200491b5873e76d9…

MALICIOUS

PDF

69.0 KB Created: 2021-10-01 00:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7853ef7be72ea8b1ea0546d1cddadda3 SHA-1: ee5147088c5db923c0086b8b73abb37943c3f971 SHA-256: 200491b5873e76d9160b7e771249871e1a060a2f453e9eae7cd2000aa2927c3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous external links, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing attempt, likely to trick users into visiting a site that could lead to credential theft or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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=win+an+iphone+8+for+free+without+human+verification PDF link annotation
    • http://vibrobeton.by/pics/files/83083562327.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/funosuvakatixaruromalup.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/wivolejafomebu.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/tulamux.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/22157215119.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/vuxapetomabi.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/97162225269.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161406f86d4b7e---38481238903.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b3d8f7189c483869f04f53baf6b398f2/fumoruvovotafisulaperuv.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/tozunotupejok.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/fikovikavazunus.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/36328824532.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fcfbbf17afd09a779d2388c1255238eb/raxixavudete.pdfIn PDF document text
    • http://zaiger.ru/img/file/87443639938.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f3f5d162c---tetajizepajutadejoven.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/verajuvusewofewujuxovem.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130588a6a761---56307821873.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614777b28d336---nebigiritekoxujugaxi.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/31150113805.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0b02c91d5f2d44e6823a6df874bd344c/zonixawi.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3a6837de6---89448755966.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/tatosesekimurixageleposow.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/28087486203.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_off0000af17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 10984 bytes
SHA-256: 0d32ddfd03d87774ea83efdf1cb229a1a6d09ceebdfb7b8c0d6ecc1574eaace4
font_02_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 15068 bytes
SHA-256: 2093114e81d7fb3b9d1a2eb30472b8d7049ad1198331082eced9c8c5878d31c1

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