Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fa29b0f73f7c8d…

MALICIOUS

PDF

75.0 KB Created: 2021-09-15 19:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2ed7d58ce8ba383e75ffd87e92b8dfa5 SHA-1: 4fe289840374be57ef698855cca66ab10ae3bf43 SHA-256: 47fa29b0f73f7c8d0345fb5236451ac98abd0d714a4d776a017006ec2d1181c0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm designed to trick users into downloading password-protected archives, often used to bypass security scanners. The presence of compromised CMS upload links and SEO-focused disposable hosting suggests a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://infrive.ru/uplcv?utm_term=free+6lack+zip+download PDF link annotation
    • https://nikosdimos.gr/userfiles/file/votuwibagigunad.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210908121323.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/20766124562.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b91914f978---wizajeredoni.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/pewinogagudazupefadeka.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///63777117858.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/lugopileremunufevuvidis.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/busivulifub.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/55956021722.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/34009751838.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/3484737256.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a70bdb12b---vebol.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16131169188b2b---gibezakawegus.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/rureretutuwixotuxoweli.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109051822458848.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/98388781160.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/domisagomijolobonibob.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/vinulotofitoj.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/31923828319.pdfIn PDF document text
    • http://scantech3d.com/files/kupumewiresej.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/37969775317.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/30469321097.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/memagalifiguxozolesemi.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/57c5259b51143dbe79e94c78392d6f6d/81848790447.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_off0000c158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC158 10624 bytes
SHA-256: 50da55c799d0d9d2335c21863eeeb0d07d550000b615dd5d774b524c4ae416d6
font_01_sfnt_off0000d9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 17644 bytes
SHA-256: c6d3c447f3036f9b13c49699b630256446cdf4b6762d5cecb1abd25d4ec2e4e6

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