Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0fa550c7222507…

MALICIOUS

PDF

84.9 KB Created: 2021-08-23 19:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7c101719b966b52d526d57fe61c7151 SHA-1: 45dd92fbfe434d60ebb7f9c741f7c461c2b87180 SHA-256: 1d0fa550c7222507af55e8f57172e6c3464d65bb41cc2dbcaf1624c0bdf770d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of numerous links on disposable or compromised hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • 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://irk-yoga.ru/upload/files/45471946352.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/vghj2jgtbd7g6p0b1inlchq0ha/67119621305.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/77679927889.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/32876356085.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cded04d913---79876262695.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/vuseputidogo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe98a51f156---30316452145.pdfIn PDF document text
    • https://eniedu.com/data/file/20210804220903.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/80837190709.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/164prc1eb4i58bldqtshdspd2f/84706922777.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/0c4c65eed2bcdd5e159de4450e229c30/60240660133.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/lizogukowosutajeduzijeges.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/50922531864.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/51501966808.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/bubobigivirip.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ro7jp6162hntvvgqv6d6tn4tjk/57606610265.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/fexuvo.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/xuvafopemerakufokadivoz.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16105d941afd42---fawasuzomi.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/bc89a5a00b230546553f39be16118ffe/gotoru.pdfIn PDF document text
    • http://vhshf.de/File/12435530637.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/97166348685.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/j3kkkree9sd13qktckgstda99q/78175234715.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/6108989375.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/gusix.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/90899295635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=talaash+the+hunt+begins+full+movie+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_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 11056 bytes
SHA-256: de85e0ff40f487b4a4d413a6f9e9bd2283fef17c9798f2e334b00e2799a46987
font_02_sfnt_off00011988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 16748 bytes
SHA-256: 9a89a6a2beff283d5c53927ef61aaaf796ff4f90d57757e79a2f34599c259e07