Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6b8d9c92e8768f…

MALICIOUS

PDF

85.5 KB Created: 2021-07-10 03:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 530d7e2bd1ba6d587c7713f7080108c4 SHA-1: 6f9756c2e0d7c9ee2a33bd1f2f21b625f7a1c0cd SHA-256: 2b6b8d9c92e8768ffb8b25b5a4600f70877e878fb8584020049908a79602713c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories. While no scripts were extracted, the presence of numerous links to potentially malicious or phishing sites suggests a redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3e7fa64a6b451179e0e865ee65f04c61/jafivuwatavasusi.pdf In PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/goxirimo.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/55109039884.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf086308e7b---5809052726.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d5602b44ea8d03407742f9cd457e247c/lomomagifofu.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608029a847975---xoroxexigi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883edebda4d---97152288184.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/jesixovikununiwuzupala.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae90fb787d---38338802487.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbfd74d12a---69627766866.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/40399998269.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/kibuwomenixiralozunumegaf.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a2b7ea3ef---86169855884.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/88098628259.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/punoz.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c8a3bef08e92096c0fb9bf29e03ad4d5/2483256848.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/931073f2c29cbabfb78545a45f53a3e9/paxerasiburam.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/840c537c5c767fe9bb65056a72e7ffce/xixuponunanekum.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/57331587373.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kn1vj5p9vm45ttrdfsb8mq50pt/8115218987.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986d0f64678---80967040128.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44dd254d01---60486831071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=finding+root+by+division+methodPDF link annotation
    • https://medlineplus.gov/pain.htmlIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 10784 bytes
SHA-256: 173d0caaaca7ba20345d7b3f41734062761ea603ca1fbef920f416d5412e6cbf
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 15964 bytes
SHA-256: 1d9c7df592e893a16eccc9a8d0b887b919a42b2ef5e35d94630ad722332d08f2
font_02_sfnt_off00013091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1