Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b0cea7988c342a…

MALICIOUS

PDF

83.4 KB Created: 2021-08-28 14:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3644295db9432bcdb58129062dad66f1 SHA-1: 4b5fd81aa64cf3a99dcf2fb08626cf0a9d965a1c SHA-256: 65b0cea7988c342a8f067b103ba0184833083c37ab6925d9c50238b94b49cbb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to various external PDF files hosted on potentially compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://alarcon-v.com/editor_upload_image/file/32637374635.pdf In PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/58737137590.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/92144798900.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02faafe43---47717739989.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/deu2uvhpufdr2ibvpso6f1l737/56549318988.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/38405241493.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/878f16e82e637bdc39b688a5ce127d81/jokixuv.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/xorik.pdfIn PDF document text
    • https://noventa.cz/media/files/file/fetirewaleforovarowezizi.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/977710232.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5089e7dc05---58984861484.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afe063d978c---24774768240.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a17622b1a---juxekalebetigaladod.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/96389602759.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/44855848687.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/16405483230.pdfIn PDF document text
    • https://arendic.cl/files/xolunikivakuroronalusuwa.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/cd2dfaf1917fbd593c0975f2effcb2a3/dotexizulapiluzisolulu.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/99644331582.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/39913909223.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041479f611---29877220360.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/binezowag.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051907515783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=carrot+and+stick+theory+of+motivationPDF 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_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 17764 bytes
SHA-256: ce6cb9bffa97d99dbf16e076ad0eb4ede0a5e027f9f16e32e9685c14749a35b9
font_01_sfnt_off00010e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E52 10996 bytes
SHA-256: 85582cbcc533661eb257bda03c14079ff1032ad74b5a79e684a6d1e182f27b3e
font_02_sfnt_off000127cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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