Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b90b6286bfe0e81…

MALICIOUS

PDF

74.0 KB Created: 2021-09-01 01:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e98a20955a3a18ae662e540c80d4127 SHA-1: fdb4cd2e8e98de602881546774ad1c4d232e2c48 SHA-256: 2b90b6286bfe0e81f7102199bca6c8a1f622fc6e55608094dddacea2bdefa85a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://derechosenred.org/aym_image/files/33684429411.pdf In PDF document text
    • http://obrienbuilders.com/userfiles/file/dedojalivezubevozasezalo.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/77535910870.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/6109100335.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/d44a04b949eb7e7509b8e2c1e7ebb17d/15230935319.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160944df09243d---61550533756.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/63281297068.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/dovodunof.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/39hamiomgpj6sqtpr8faart6i6/dudezenadi.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3e2c441e389c61d7b99ff025e1edc1b1/93741314165.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95152ddf86---vesozusipoji.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b7186580e---58848871676.pdfIn PDF document text
    • https://actorconseil.com/files/file/14386612892.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af98abe15ac---75860049493.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021070911300873499.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/24b9a809a0de908e0cae38241415080d/puzuxebajabotexerad.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210701050135.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9430cd8ca6---minudokekevidiviwerozizi.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126ce5bb0ad7---xadumimuzomesukovatorir.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/1d1d7ef7da391179947a6bb9f32c3147/36405944192.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/noulq2rlojhh0nlj415bnulscv/60503825414.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6583dd434beed0576a1cc06e62b67712/wotujodematatu.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/rapirupas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=where+can+i+watch+bnha+heroes+risingPDF 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_off0000bec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC1 10684 bytes
SHA-256: 7dd1f576075d2df68c773fac0f740b4dbdf1eaf1e9172f6fed2a055336f30025
font_01_sfnt_off0000d751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD751 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 16440 bytes
SHA-256: 1308c8477b94816580a04ebdeab27db1bedb4ea06a22b634e83a073eba52d21e

Open this report in the interactive analyzer, or submit your own file for analysis.