Malicious PDF — malware analysis report

Static analysis result for SHA-256 345e31f32dc61e75…

MALICIOUS

PDF

89.6 KB Created: 2021-06-29 01:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1a344023c329e854c140429fd01bcc1d SHA-1: 59caf35830a6c93d7a30f0a620ef4970c7c28a25 SHA-256: 345e31f32dc61e75cdce73c82a7e00b700d907364ad041e4805a0bb5ae577679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. The PDF contains numerous URLs pointing to various domains, many of which appear to be compromised WordPress installations used for hosting further malicious PDFs. This suggests a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d361bfa83319853dcae6aa981ade6d63/27433720590.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c700d06587---xiwosoji.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/19480548190.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/nozenefev.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ozolabeguwegofujut.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8f946875---bufepuravodojina.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8381838ee---sifubezutawelaposefofupo.pdfIn PDF document text
    • https://airshow-bg.com/file/rawurenukizut.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/292bfc8a7049778903b7bf8dcc4bece4/63354509886.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/61974825069.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d90d178f28---43445045974.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861cf924b47---debizojaxelapamolaxiwejam.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jlg8bf0a2fssk7t3454i20isr3/pupoj.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/mumizudulekufobowug.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e842e0f4---54839620474.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ed830520---tisoxofilewevikutoso.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/1342085969.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/94264496981.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/02d21d461a8fec5e9116e3f9e0812fe8/xonikikusemas.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/17006761137.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/48229555730.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2ba54cb11---15994154926.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/89222388419.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/645247b3ea6c37ff6690856599816288/19287813288.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/tawibira.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609850cb88253---sevigawuxufef.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/gabobak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cpvc+sdr+11+specificationsPDF 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_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 10716 bytes
SHA-256: 0573621588518eb810a904ddce3badb71d21b8d3412dfdd7f61ff59a13825d5f
font_01_sfnt_off00011419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 17412 bytes
SHA-256: bb863e3acd8a4e77eabc271e6b84eb7c4661340bdecaf6a5a67c4ba35d21e801