Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc805cf7be1f46b…

MALICIOUS

PDF

92.4 KB Created: 2021-08-02 13:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d640742751e1e84c24058f096f961b64 SHA-1: bcbfe03740245d5ea553e091d65bd0f82b305af8 SHA-256: ccc805cf7be1f46ba886e6440d96311c79f64cfc36839a43150874cc53574f8f
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URIs pointing to various websites, including compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=when+were+the+12+steps+of+aa+written PDF link annotation
    • http://londonjip.com/userData/board/file/bifewamulonokexapogo.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/18393944691.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f8b40af7---37294174003.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/4504531246.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/644b37d23a99e2abbbd10cdf24f73e68/pamaxorupetipirivezinowu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fce26a69228---98256038454.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b59778164---febevob.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1b3e732a---60087055527.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/rifisazifulituzogusi.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bec4c6733c5---83080476824.pdfIn PDF document text
    • https://birudongker.com/contents//files/28546414408.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160987c64d9775---tiputusesis.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961d054e5d3---kuluvewefiv.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec720f1b7---fizaduvazowozi.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/ede92230515d85690aba6f0a7455113c/jobuwovilebo.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/79125323450.pdfIn PDF document text
    • http://flirdining.com/uploads/files/96377186491.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/98069170951.pdfPDF link annotation
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a218dd0082c9f23542220f283f4fb39b/xivitegi.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0283a70f1---31187861990.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/tf8act692dh2r83agfh23dio15/rebosid.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/27765853092.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/44476879195.pdfIn 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_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 17408 bytes
SHA-256: 2550b1fdf299b4d328968e195af6911aecc3591eece9932cf12d8d00eb5cedfe
font_01_sfnt_off00013108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13108 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001491f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491F 10660 bytes
SHA-256: fbec63e38fe5d77389226e525610eabb3bb9d63bfba820cb05f41f5e30f5ed4f

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