Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc7c0924b7069a6…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 01:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 378f80fb3fee3e5ac90e3ce912cf79dc SHA-1: 7862fcafa8299fb98b329a19a6443cd6288d4a01 SHA-256: 2cc7c0924b7069a6c1c67747ec0b13ea9e6c61dc200a8aa28ec0e9feb862871a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://cructi.ru/uplcv?utm_term=videoshow+full+apk PDF link annotation
    • https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/viluxozunanulader.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/eb7fd6c5bf9ec46ccbc26b5df92c212e/30918076802.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/4366173b514ca548ebbe0ade94711292/81210669117.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ac269da7f4f96df44abdfa4ec7b857c6/luwenejisatadufizumopi.pdfIn PDF document text
    • https://begili.com/uploads/image/files/raneramorupevejonifowib.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/49460056574.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/246443054.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c04f3ca50---vemusekiw.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/xonugesadumebo.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/4661187107.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/175730445861326099a25a5.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/kobeguvanipegudevafoxu.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/16786147999.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/81380060439.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/44551515272.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/61369909305.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/11555591252.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137564e3995e---lojovinedixiko.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/g0c27loqc581cedcelbpibvsb1/92203024481.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a6ebb2fe8e2ac2a89ff56ab78d15f00a/66493939057.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/41442650879.pdfIn PDF document text
    • http://kammed.com/userfiles/file/98925266651.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/48960580073.pdfIn PDF document text
    • http://ruihuitax.com/files/file/89569407600.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/zoxixulopexagixuderezam.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/padomida.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_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 17720 bytes
SHA-256: 296218fcb08181d72aecf150e27c1f940a8a02658fbbc942bf88dec22e727e13
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 10540 bytes
SHA-256: 2b6a19a844d85a865abae173c3623ee8c6d2b06a08592f671544bcdd980acebd
font_02_sfnt_off000123dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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