Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ae1fc45ebe5165…

MALICIOUS

PDF

83.0 KB Created: 2021-09-19 01:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 868c693e55c605aa801a0cabaaf4556c SHA-1: 42dad2f76fea2b91576b61cb6456f53aba2a4866 SHA-256: 79ae1fc45ebe516501179e42b5992c15cb2907a6513012d87ac3c428069b40d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://dgkno.cn/upload/nejokinuvuzisije.pdf In PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/pawoputuwajolugowezevupun.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210916015149.pdfIn PDF document text
    • http://sushi-belovo.ru/files/zulelusugakipokovipagid.pdfIn PDF document text
    • http://allier-genealogie.org/File:/88977328660.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/36581331014.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/vikafasufa.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/58290579675.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41ce04966---gajemizakuvi.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/ralonerozizadixizerid.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d98c31c0e39dfa457bd628e99da2e452/20297068478.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210910_222108.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/91539767487.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/lojudujulovesavej.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/34308395362.pdfIn PDF document text
    • http://congchungnguyenlieu.vnpec.xyz/uploads/files/22550023033.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447a8b1af2a.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/45961653184.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16133a4a1266e8---48438022729.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/fipumukuzenilotapog.pdfIn PDF document text
    • http://muszempilla.com/files/file/jilerazunubojinonanomex.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/57180832443.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/rututuwuvojuvasuw.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/raguxirinav.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/wixelewelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=war+room+full+movie+englishPDF 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_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 10720 bytes
SHA-256: 49cc2e4fab822003cf6ef2131f6ac62d6e95d2ac692c4d9d311f352d0d8ffb3a
font_02_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 18500 bytes
SHA-256: 04e622acd6bd833ce432f79435367f2ffc7208b84ad4cf02c6ee6273277f45e3