Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac1e68d2e0d1595…

MALICIOUS

PDF

88.5 KB Created: 2021-09-02 05:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 63573c3f281e329965dcb20be6db7d28 SHA-1: b6014ab0e1bd581321a4b54fe1270845e55d775e SHA-256: fac1e68d2e0d159598a97d7afe21f0d3b9403934d731c15eff9ba069ed6783bc
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://roocenter.ru/upload/file/89835257031.pdf In PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0478a7945---malofifixug.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/40787035771.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/56769838296.pdfIn PDF document text
    • https://marosme.ro/hirek/file/penokewowagadolufubo.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/xemifunetop.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/denanovozekukogi.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/2536194056.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/gofesilapara.pdfIn PDF document text
    • http://aurora-c.jp/files/files/63844081028.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/wowirul.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/gukaxuxiluripinaxanokofup.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b2f320bb8d2---50155522137.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/bubidamiwunutew.pdfIn PDF document text
    • http://michalbaryza.pl/ckfinder/userfiles/files/pajimekatutalitu.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a34be5a41e3---xokunijekasulaj.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/xerarizekama.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/xuzuwuladovidor.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160782c190b8c5---jojurujapemovololan.pdfIn PDF document text
    • http://rayanchem.com/d/files/tojek.pdfIn PDF document text
    • http://relatives-united.com/clients/75139/File/76799204996.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee7ead1e03---53438367171.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/5dmh4vat08f377fokneat72aln/51396521440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=good+morning+beautiful+friday+imagesPDF 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_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 18448 bytes
SHA-256: ca6d8a157691ab63261669493edcf5c74820671b6a66b7ed150c453c5128578b
font_01_sfnt_off0001232f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232F 11088 bytes
SHA-256: 74e239d8742c4859c0c74a28e0a2a16293ffd0d24ba71255f8aee76b2432626a
font_02_sfnt_off00013cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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