Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6209143f929b2a…

MALICIOUS

PDF

81.3 KB Created: 2021-09-16 10:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 75f966fa7266452647b138e95a68afc3 SHA-1: 6de3b5ddfe147cf0ef61589d87abec0125ea5b43 SHA-256: 6d6209143f929b2a70a1a13ac4b428202a30f01a93f419343614248b671d6e06
172 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF link farm heuristics further supports this, indicating the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9faa79280---35063374701.pdf In PDF document text
    • https://holcom-wd.com/webroot/img/files/sixuvupagijegaforonu.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/63414437824.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6cd45348f4eb81874021a60fd6a07c33/83674114372.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/gafuretexo.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/87034770876.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/64465520689.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/1554531249.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/tolozikapufo.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/linisavuketuje.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/fomenukamuzixopebijijeli.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a6c936d0bc5a6431f8b007c89dd13070/79389977329.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/tovevigubux.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kafifu.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/tirimivitij.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/fedosapaji.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/79641147503.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/12122347194.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/dobuvapogewabelilulil.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/wodurutekezadabez.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/vitidaxutelo.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/bukup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+live+wallpapers+for+pc+free+downloadPDF 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_off0000d3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C6 19224 bytes
SHA-256: 3b563c90e6ff6ec18ed57883dde45a47f7f0cd520ae2678dde1870570d3e839c
font_01_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 10820 bytes
SHA-256: bb33f43ef844dc102555e1a2567af70f5369f3933e0f2ef0e53dbe32fe274b9e
font_02_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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