Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43a0bc0065cc92b…

MALICIOUS

PDF

69.1 KB Created: 2021-10-04 02:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0521a52e8bc1154ceca0dc91a31902f SHA-1: 988c94f2755dd5108754cd170941aa954d0376ea SHA-256: d43a0bc0065cc92b15e6a3416465a437bb3316742608377eaa5dcd9c1bc48437
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 document contains numerous links to external websites, many of which appear to be compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=6+divided+by+16 PDF link annotation
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/89ef8de90386b9d3fa3f83de620a4e14/35805014666.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb25ed3139---17804967057.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145935be89bc---32725768576.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/45289302670.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/73175174392.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/gomimibesesuvalulikeduke.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/guxipujojaxuv.pdfIn PDF document text
    • https://n-tlg.com/files/file/72610294087.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/siromamugodag.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/sexaba.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/45823177593.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/wagazazemow.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/64599711774.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/87067275713.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/12066058674.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/noxasaretakerulijesufa.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/47627166218.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420ea786029---xepademalevizawil.pdfIn PDF document text
    • http://ktcz.eu/files/files/xogitiki.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/sifeli.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/96721966262.pdfIn PDF document text
    • http://mosjob.ru/images/file/serakupufa.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/nimamovif.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/11439917953.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/tuwutetex.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_off0000b0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BB 9888 bytes
SHA-256: 9f581c1ded96c655f4c786c71991893a972b2e08210e357ee47caa62893a6881
font_02_sfnt_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 15952 bytes
SHA-256: 76b76cedfdd45b8ae09c4531c84d94f8e9e00727ef3af0ade585966a4696e1c0

Open this report in the interactive analyzer, or submit your own file for analysis.