Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05c1f722e65a4a0…

MALICIOUS

PDF

94.4 KB Created: 2021-07-13 23:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49fbfa03ea2929c02aeb24036ab70ca7 SHA-1: 7f18ade1fde8d0182b4455c37bae2ba945d05b5d SHA-256: c05c1f722e65a4a0cfdc1d2aeb7dee79713474702516f46cffe9ff3292ea108f
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 7

  • 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.
  • 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
  • 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://www.tsahimmongol.com/uploads/images/files/87983556165.pdf In PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/48584882291.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893d99d2adf---xewasibaratubusotirak.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/41945173615.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/vepativafigarid.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/varokevuwozunamesubev.pdfIn PDF document text
    • https://krossi.ru/images/content/files/xepomulebuwabof.pdfIn PDF document text
    • http://kajsanordstrom.com/userfiles/files/12259635423.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/8f81b57176bbf65a260f2a857aae6020/bibepopugaruzodusadipek.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a470f2648b7---61709442689.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/149c7d2cc8a3fb17e95f21ccbfbe9084/ledutavisozemada.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077163911b99---giporewelikotugunixon.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/nemubef.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/70935129808.pdfIn PDF document text
    • http://minhanh.com/files/pakipifatuvebomajatin.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/suzuwusa.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/5865898963.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3eabda9cdae7ab05a62e2e68fb9df064/rawupevo.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/99631789539.pdfIn PDF document text
    • http://stylekd.ru/files/nawejomefutizi.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c226fdc48b3---munawilerugukakimobi.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085677c1c7ba---zizetilujowuzeronuw.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/30809614a25f969d86e4e72675d0dda8/mobojitanoburakezizusir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=3d+modeling+software+ipadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 17336 bytes
SHA-256: cf47d2b0ec84626e02707965f22f884e29de1a44aaf6c3e4db9a42119ad28624
font_01_sfnt_off00012418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 11004 bytes
SHA-256: dcb36fdf29665f476325e664cd4cc485fbf46baa0a0415da634075f4b8b9f48e
font_02_sfnt_off00013d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001558b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558B 16652 bytes
SHA-256: b5fe00293bf0e6f09ef06c2674858c6e64c0d3c92826956cb8e14acb6c51d3c5

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