Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6bd6b054e7ebfc…

MALICIOUS

PDF

82.9 KB Created: 2021-09-16 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2a7eeabbe504ca7accd15288c7b8060e SHA-1: e04738e8d49a2d7cfb2d0b6b1e22a3ab3fa704e0 SHA-256: ae6bd6b054e7ebfcf07d5645c1d227e62bdb757a2e2d0f0306b8f88bc97e06cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=genshin+impact+ios+walkthrough PDF link annotation
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132515da1fad---rurafizip.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/fivinomitixorawijenifaxu.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/daxefuzotowojizulovizop.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/veledubifogitugela.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/12175398425.pdfIn PDF document text
    • https://priscar.com/documents/files/6911736583.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/mibapelosubupekolemezep.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/90054168563.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/wisunudipebedusi.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/50827782379.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/jabivuluneranesuza.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/97559196931.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/8548116939.pdfIn PDF document text
    • http://chenruichem.com/upload/files/juvixejew.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/sabijotofisowatijemuzataf.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161372a97a4761---15902789334.pdfIn PDF document text
    • http://otczenacts.com/media/files/mufagupaxetisokaw.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/90454236599.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///lalofexirezozoti.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f47c522dec---zugevunikajunerivoget.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/30303924344.pdfIn PDF document text
    • https://panoramabyty.cz/content/60483860085.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/26581925097.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/womojuzofubogup.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/48774439393.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131ab2925a43---depenivizasafuramaw.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/14746880829.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/zubojipogunez.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_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 18504 bytes
SHA-256: 72cd69daaadfb3e23685a888b5460de76750b9cb0ad0a5ab1ad51a30783851ae
font_01_sfnt_off00010bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 11140 bytes
SHA-256: f713d725b4a6ab8d9aadfc77c885d6825107aee2370ffc0102b4f66850930252

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