Malicious PDF — malware analysis report

Static analysis result for SHA-256 69adb6059e81bf71…

MALICIOUS

PDF

94.1 KB Created: 2021-07-14 04:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 5442ab4698816e6c96b079f964db5f21 SHA-1: 69a632903121473c0dba6cea1db30b59991282b6 SHA-256: 69adb6059e81bf71cd7d5876aa207167db309a4d279a41f7e2f80ccb45e6c897
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for SEO manipulation, often used in phishing or malware distribution campaigns. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=ip+address+interview+questions+and+answers PDF link annotation
    • https://artbynela.com/uploads/file/wavux.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/81631077950.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/8149510119.pdfIn PDF document text
    • http://www.asslar.de/downloads/23836809207.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/bamomu.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/feb26613090536c73a047b8ceff5bc83/37238626439.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/palapap.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/21012145719.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/50552491258.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d65ba39ccc112996f7e9e86bcc963742/gezelusugukuninam.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/16788197164.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/74e1990563c08b3c408de980253d9196/wokifisudi.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/599b67ff11d08494326c352233f020cf/65405410256.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd2a130df---27227775681.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/lemajezu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a1e55f7b---refas.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4a1525d23---88630571908.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/oqk8f3u6rjbbsjgl78u0fustlh/37934621848.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160700dead2f95---36716007836.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202105281816433293.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3925e85994---nujuludugil.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/0199e3285687e07a537a49cd7137b272/36265625722.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12432 10688 bytes
SHA-256: 1a421cb3a675fb71ea64b3f19c4c362f434c6d510ebc3a5a84ed36522d114480
font_02_sfnt_off00013ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA3 17792 bytes
SHA-256: fbb89f52d6edc2c829b8eb6c33ade0404da17b311566d31f4313a03617cfb24b

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