Malicious PDF — malware analysis report

Static analysis result for SHA-256 5429201e45ed0a20…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 11:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2dac60151e59fc3727ecdbbe0542fd06 SHA-1: 385243c1f7f96009c64cfb9a50d9d9c6eaad0dc4 SHA-256: 5429201e45ed0a2072e87a123d26a987c71bf399ef3deea3570497b162c89f0a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076b31a7bb57---72358853568.pdf In PDF document text
    • https://detectiveoffice.net/userfiles/file/77820942997.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/xodujupufefiji.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ccfeb3980---17333087220.pdfIn PDF document text
    • https://semut73.com/contents/files/vajexe.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/pixovewekazuwijujuwoleje.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/mafes.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/govixozi.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/40041963840.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/rodomoma.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/plr5333uubn59tmb12r65k1n1g/xipub.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606f134c0df9b---78235596300.pdfPDF link annotation
    • http://yarpb.ru/pic/userfile/66157434579.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9afe7d7d9a---57926743129.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53d159b68b---12471027131.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910d12125e0---minidezaborugopule.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/xejugusaxilikasawo.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/89975160768.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160dea70f2554a---besabexujefuw.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/11602844927.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/83886873160.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/sidodilase.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/zigasamikemarokagivev.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4lkfqhm8pqffr4a3b17rsp3iub/87810387485.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/15506572525.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/01/file/20210601_062730_108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=dolmar+7900+repair+manualPDF 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_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 10588 bytes
SHA-256: 4ba6007cd94a26c210b1eba1f10f0b2ff51ec582c7695aecea8c999a2e78c04f
font_01_sfnt_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 17032 bytes
SHA-256: 791215b5d86060fd3a5b51a2caa24f8344df5d9d93008bd278cdc1f29801e3cd

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