Malicious PDF — malware analysis report

Static analysis result for SHA-256 6984894e4d1cc782…

MALICIOUS

PDF

127.9 KB Created: 2021-07-01 00:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce767746a7ac347b563008f8f47a8c8b SHA-1: 14fc8f7270da163530fdf87970046a0a9714c907 SHA-256: 6984894e4d1cc782679e09aef976f88a5cce8c27f6c07024994a0e4ebfe4586c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are designed to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160883aae0c15e---49812008157.pdf
    • https://oklogistic.lv/upload/file/2831162837.pdf
    • http://say-international.eu/userfiles/file/80526210315.pdf
    • https://htddienstverlening.nl/userfiles/file/batikodamodaruvewubefam.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/dfc582eb69409177416b9f4c73045eec/6528207589.pdf
    • http://baraanduliaptti.org/userfiles/file/71222480211.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fvqntuqag16937bfsp049m00o3/kokuzakewibi.pdf
    • https://securitegenerale.tn/userfiles/file/19218641315.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b28bcc558---64540191841.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/23dea89ef702dbd35f728f566f94d99a/fekumaxerobawolijozew.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c056327feda---jefusekonanu.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afa3017119f---68507496408.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/midoma.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1c877312d3229564650e51ff1389868e/koromuv.pdf
    • https://speculatio.in/ci/userfiles/files/sejarumubugizezerugamo.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b22b1c49c---33870067821.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/41u3pdau65pmlmb04uil2kos46/46845360616.pdf
    • http://turinhotelcompany.com/userfiles/files/raranosamu.pdf
    • http://alconburyreunion.com/clients/36523/File/bivunun.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/fc3e7e37b42755519fae562081d0ded5/masotaze.pdf
    • http://olympusflights.com/files/files/23590010494.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+theory+of+finance+fama+miller+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000191b2.bin
8ff30d9777ca487dc52fc323b82fdf8ede56f24e51846cf9262b5303f36cd342
pdf-font-stream PDF embedded font (sfnt) at offset 0x191B2 18116 bytes
font_01_sfnt_off0001c133.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C133 16792 bytes
font_02_sfnt_off0001d94a.bin
3d83deba7cc66d744164009692d975a53c1852f248b990c71d0dd49fec787c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D94A 10796 bytes