Malicious PDF — malware analysis report

Static analysis result for SHA-256 e202fca537734d45…

MALICIOUS

PDF

83.3 KB Created: 2021-09-18 10:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 784c20340578f2de80a717e6fbe2c535 SHA-1: c17fa3bb28ddefc8eb42934487eefdbb65c66284 SHA-256: e202fca537734d4580c5e0a1378c1f1b90be694ba8deba9c443e6e2e9facff6b
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, including compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristics and URLs confirm a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://hnsunnyfood.com/d/files/xuxuxur.pdf In PDF document text
    • https://huanghecables.com/d/files/kekixozizimix.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210903093050.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/mumalusijire.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/ralajifesinedomi.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/59743952330.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091413145269.pdfIn PDF document text
    • https://digireg.cn/upload/33684632846.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/137203887e7b0d26263b2ff2f1207733/tewagati.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/wewumegulojagikes.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/dexubed.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/5d40e2724088fb6a4e166aa341bc0c19/mevawugosufibizet.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/57689218872.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/bawek.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614090170f7c9---xagekokigiji.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/68199120515.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/84673733298.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/93978205169.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/88485215259.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/weradabinibewijiwisom.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/45813795479.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/lunagoxijenolomikiseve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=d%26d+5+edition+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5D 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_01_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 22432 bytes
SHA-256: e8edb1bc6c2251d155f3103aaf8224d70f14d93ad5592bd426a41272009e3f01
font_03_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_04_sfnt_off00013612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13612 1964 bytes
SHA-256: cb83427253be486b5dc35224710cea1d2a27078ad6da64da340d8beb93dbb3aa