Malicious PDF — malware analysis report

Static analysis result for SHA-256 c175930e59e404eb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-13 05:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9804afba4554dc6ab0d3de63244a9f34 SHA-1: c98848645d5bc66652d70ca3da4c99902ee22d05 SHA-256: c175930e59e404eba59eab7e37c0122ab91a164f61c5428e82dc96b52e46f1a7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/5eef15701b3301bb6c5546e7c43079ac/wamanidozusofuj.pdf In PDF document text
    • https://fokusmedia.com/images/uploads/89454905377.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/20305823637.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9cdf39569---wotamuni.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/rifuvitowusuvowalositeg.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/puvagapimutuwologebiwebid.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/96859747457.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/fulixuzedobalawabikufir.pdfIn PDF document text
    • https://foulardfotografando.it/file/fifigurutoluwariparapefir.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c55b06c69---mepekojapabol.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/34102359950.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/47211253085.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/9194005564.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/wolom.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/50265361966.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210908073401.pdfIn PDF document text
    • http://trieuduong.com/images/Download/zotojujeditumesudasujag.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/fukoganaxivevodatusofam.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134227f3f3c1---pafal.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/nekujigiguzimapugotevisu.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-13-02-52-09-Shjnz236.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d9a5e285f7f1c697c3dbbc900c952026/40563841898.pdfIn PDF document text
    • http://paradoxine.com/upload/files/95276535710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=vmix+mod+apk+downloadPDF 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_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 18768 bytes
SHA-256: e57a7da50ecf257626463bb7d4a4404e823bf98f94ad0af7647ac9a4092a5f27
font_01_sfnt_off0001042e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042E 10304 bytes
SHA-256: cec9b3993d852691192ee0e388618e57551a4463c379fe891e685c1a58537f96
font_02_sfnt_off00011b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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