Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89fe8fbd56bdd69…

MALICIOUS

PDF

80.5 KB Created: 2021-09-16 13:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94a1c846746cb0cfe99e7c81339ade99 SHA-1: 7a891b0d037a08ed31aebfab239c5a1fa363fdc8 SHA-256: d89fe8fbd56bdd6964cf00a578bafd56c538049711f72329247831cae69a7171
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://zenithmetals.com/files/67302387050.pdf In PDF document text
    • http://simkoongschool.com/uploads/editer/files/86697964422.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/46773902483.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/53892128055.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/mezemanafobefenodinuwifiz.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7d8b6952---37795530241.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/77078642374.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb89f50012---podipekefuniwa.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16133e6b01f3c0---92435368308.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/megiteleg.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/modowagizodapakegulizugav.pdfIn PDF document text
    • https://ms2oke.com/contents/files/94263186095.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/50423512235.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/mubepozike.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/69580699280.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/dokenuf.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/8719792503.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/37288986859.pdfIn PDF document text
    • https://grouptm2.com/contents/files/mimapapopew.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/75705793233.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/liduvelegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ramleela+2013+full+movie+download+720p+openloadPDF 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_off0000cfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE5 11104 bytes
SHA-256: 0427ed0d46083a1c668671e96c7ce7259e952fe075bd0cfcd5cf4dc25943402e
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 19124 bytes
SHA-256: 3758565586cd052f30981e4354e1ab9ff18b6a0ced4559e3c67ef931b8c76dc6