Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c00741dfdf2ad04…

MALICIOUS

PDF

71.4 KB Created: 2021-08-28 04:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 06dd2cf32ae99e540e0fb89258d315a1 SHA-1: 741599e806b53c28cc7b629389a023357732865e SHA-256: 2c00741dfdf2ad04339b6e9f69be0190a51f77db5254c55b5f90b9d7e40083a5
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 and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/lncg4hg7esn2cocrjkvjojb6hf/zadamalidu.pdf In PDF document text
    • http://studiolauramoschini.it/userfiles/files/77150137187.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/sibuzekorizogulopelimema.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/25594973768.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bb399ac1988f7ee338cba9822dafe834/satumotapo.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fa572343d---16864789486.pdfIn PDF document text
    • http://hevolta.com/upload/file/gosiwokovil.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/nizalinu.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23e71fa8ab6d297f9f374a6037ecc915/repopisepa.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210517/210517054240710030k3dxgu18j56n.pdfIn PDF document text
    • http://didula.com/img/file/56823847482.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/93465698610.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/kuvoduxijurepu.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021072606131270554.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc7eb496a8---53834275949.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1692a73bf7---72309991993.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe9e576f99---93703037408.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d04875ed8---3419450471.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e436b94082a---dikitevakonokosig.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/peliwumoxozejogosupobawe.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/xamitizesuxikisaluduf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a247c6e6d2---neruvupifosejibovizazako.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/pumipuwefaloda.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/digoxovorul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pos+point+of+salePDF 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_off0000ba8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8B 10252 bytes
SHA-256: 9b99e4e8c4a6b9dd06369e2d96c2cfb580bad1a64a0384a84c5e8507fe675a0d
font_01_sfnt_off0000d1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 15080 bytes
SHA-256: 0e2ea6a7fb1f616a2e541bee05066a106e0956bb6ba967ad451236f613dda6ae

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