Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d483fd544fde216…

MALICIOUS

PDF

87.3 KB Created: 2021-07-14 02:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43e964fa2ac714cbd40bc206178a8d0a SHA-1: a4579cf0b6e3ca2c84d54677ace73e56969f2d6c SHA-256: 2d483fd544fde2165aca8324d682fdd710ffef4a6da9a8657613d003ff30dc6d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially malicious files hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://scuolascifondocortinadolomiti.it/userfiles/files/jadoroga.pdf In PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bb3ef534---reranusagukiras.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff8633032e---tisux.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/getowovixu.pdfIn PDF document text
    • https://siroyensao.com/upload/files/35623529125.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3bf0b19bc---dozafobagubeve.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c295eef8a6---xusuwuluwefidisasu.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ed4a10348---89920561679.pdfIn PDF document text
    • http://sushi-belovo.ru/files/26737373505.pdfIn PDF document text
    • http://jump360.co/upload/files/20210620110048.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6d102c9fb---palujota.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd5e977e61---bikodulelusoxajiw.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//49294084656.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/jivomenonagobebiwowazuwo.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/vuneposofomedoju.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/kojusam.pdfIn PDF document text
    • http://goref.ru/files/file/26592889842.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/adcf607bc279e5174805c57e5b845a39/xakomep.pdfIn PDF document text
    • https://arerp.kr/data/file///bofasuxemokelifewakidivis.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/se5rs20stpnf3arf8indolft1h/43342888800.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/l5ujnojlbne0ipn7nqoclr6np1/zeradefofabolupovinaxub.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/p6cfov3p3stij1v43amj57agj4/selasi.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a145b6d675bfc039c0e148456c3f5d9e/panosowur.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/ruripofuloxakexofuwar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=trichomoniasis+effects+on+bodyPDF 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_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 10912 bytes
SHA-256: fe55661fd883972341114561b9690ea0e6715cbe885c960c5088cd12a2f0c9ca
font_01_sfnt_off000108a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A3 17444 bytes
SHA-256: eb1878e011fef8120ea9d8c45bd7b419f56e30cff95884eea4ff9ba1a3110800
font_02_sfnt_off00013639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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