Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7825ca938a2828…

MALICIOUS

PDF

98.6 KB Created: 2021-06-08 20:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e1fc2dc221914e781927842dac910ad5 SHA-1: f92a11a1d4e03ca8e68fa67ebd5497d742658bce SHA-256: 2e7825ca938a28284a38ea354a5eb58d32a9ad87e8f4361784a6d3d4a7af4152
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://catamma.ru/uplcv?utm_term=dragon+ball+z+kakarot+android+saga PDF link annotation
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077101a9d678---negegarigem.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160931e23887ea---17728396928.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd4e29cd82---fefijokenavoma.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/dca98d2c158119707ec0ff5e4a60464c/74552214851.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4740109eaee011990b8390ad8c753990/70982323026.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ab1f9527e8a296e0bb3d6be4117d5911/fezug.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/vogam.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609463de089c0---rutemodororirilivese.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/wovepi.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a553ad059eef7fdbbaa80d9047c376dd/54040048746.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/vumulubatijomamam.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/nisetuluwusi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/e7kiraiing8fbs0n59793qlltg/23991521140.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f54576265---52598078304.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bee1002630d---68176582.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160977bc086177---47916908180.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001240f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240F 5744 bytes
SHA-256: 4229fa6f9711f64c691003ee2b00a9f5c62750ee1c4799b237a9527483a8127d
font_01_sfnt_off000137e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 5244 bytes
SHA-256: 252955536ff99ff4698a017dda9ae47dc3adecb06c6491ecc73e30098136b02d
font_02_sfnt_off000149d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D3 21748 bytes
SHA-256: 4f816782ded6c1279c118531377ed84507fe7e5caebc9c324af067ac89de2205