Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7321689c4cc875b…

MALICIOUS

PDF

94.3 KB Created: 2021-07-06 21:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8936135716ca69f18825903596247139 SHA-1: 1a318f118c89ec9693d9e072e70551efb2cb95e1 SHA-256: c7321689c4cc875b6ce6dbbaf8a5b4d95c4f93d25b87cdcf3ccdd672bb3980a9
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://crysiq.ru/uplcv?utm_term=how+to+get+rich+fast+in+gta+5 PDF link annotation
    • http://detikakdeti.ru/img/file/60549738841.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eff6a89433---zepugunijejejoto.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/71427816636.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/36687d8748f54b0f712a9f351bd3f469/desid.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/22659750585.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a44fc396488---gegumufutugupeso.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085f57373ece---zikulusajevaxilujubasit.pdfIn PDF document text
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/fotinanavozo.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/zifokifepemixisigugodu.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/majenev.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e977cfe1---vuzevemilup.pdfIn PDF document text
    • https://majubesar.net/contents//files/73943905441.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/8607076045.pdfIn PDF document text
    • http://evola.it/userfiles/files/fozuvezijekagudazodig.pdfIn PDF document text
    • https://best-label.com/upload/files/23353265148.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/tejetow.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799c148c41f---gazitabosagabuf.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2b40232a---fusebapagazis.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6f878f70---35597546529.pdfIn PDF document text
    • http://haphadoor.com/upload/files/68191014228.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160799bbf4a597---32032484079.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/90517135270.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/vadudilib.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 1920 bytes
SHA-256: 4eeb9c1d75b788b56c7e9bbbbe0dcd0fe632c63fe71f2c6643b12ef1b984e79f
font_01_sfnt_off00010a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1E 17748 bytes
SHA-256: 3747416b2fb97118eec83144a16873559c143469c36a063742953ea711b4bbcf
font_02_sfnt_off000138e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E6 10780 bytes
SHA-256: adf2a12f632c31946f23d6b00c6021a0967157fc2833f7d7c2a13ebc8e28786d
font_03_sfnt_off000151c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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