Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e65df92d4ba7f7…

MALICIOUS

PDF

88.3 KB Created: 2021-07-28 11:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60a5355addd1ef3262438b7f67860e21 SHA-1: ae3534510acb934438f91e410b92481a51ed4e86 SHA-256: d9e65df92d4ba7f768fda60d5b5fbef5e811eb0d6de1b64ff56ac7a65d154af9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607385da99607---vusitolajutotogimit.pdf In PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/5119446704.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b6de7767d16d612884bbd298cfcec48/18119444814.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hiankjee3no8gm9o546u1r4c76/52307787628.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/3bf1b9f1b8e24d0b0e9b6117d4f84c58/74116233188.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/19686085116.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/nuboje.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac50e5665e2---79181257866.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/gofaxux.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/fomuxanebopupe.pdfIn PDF document text
    • http://metapolar.hu/tmp/momiboroturomatir.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/iaat1qq4qo47bd5vpt2otjv835/24547936490.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/mefuderinedimerolitomu.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/vebevikubenazavemubov.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b4233c3c13594f7ae63131713baa9e26/pazedi.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/sedezodaz.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/037e0904fdf3974f614e66ae1c0c32e0/tudenugojolotidazere.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b38779f96eb6c643632579ecb3083ee8/23041661197.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/v757jk6b5kqvnpj30trkoit37o/13446251826.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/dizuka.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/0461425b430c70f3db5decd3e7855387/46129250225.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/27638233031.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/torinabanoxisewemumusatip.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083297a727d4---vapedikimaxu.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/52678525402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+much+is+the+avise+testPDF 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_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 10488 bytes
SHA-256: 769efeb5f6ef67ff3aae6b84dafa50d76d6fecba609663bed15b87ff68060572
font_01_sfnt_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 17704 bytes
SHA-256: 199a5fde9889560aeebb9f33ac881cacbc6ca5a483d95d95ffe7bb895c73423b
font_02_sfnt_off000139ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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