Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32fc7dc58040a3f…

MALICIOUS

PDF

83.0 KB Created: 2021-06-25 14:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3b868e273a6615016771ed91db1a96ff SHA-1: 43eec832bbb3bc721e026e774ec939fcd9afcf98 SHA-256: d32fc7dc58040a3f1a97682af3b1396de8b927a0ed2d881ccd6c9f729ccf39f7
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics suggest it functions as a link farm, directing users to various URLs, some hosted on compromised CMS upload directories. The 'Password-protected archive lure' heuristic indicates the document likely instructs the user to download an archive, providing a password to decrypt it, a common tactic for evading gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://allytemp.ru/uplcv?utm_term=who+is+the+number+one+richest+man+in+the+world PDF link annotation
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48557298116.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04f5c80690---xiturodazupavekozosiju.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/kuxuzusarikukalum.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4da0f9073303bc1b273a576dd6f716dc/29510968168.pdfIn PDF document text
    • https://adikketiga.com/contents//files/zelotazosoraripa.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785991780f1---dobonepupu.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/44409500205.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/97528552783.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/dijavagemufaf.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/bigakerirunetu.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d1901675---jagutegojazosu.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/lumakapevo.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/77295111526.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac360111d---bidebekagogurek.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/24a7d252fc303a7ffea03daf4ce4bab8/58981197693.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5e3c1d341104c8ad7f09a38b56c0c721/13019072813.pdfIn PDF document text
    • 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_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 10952 bytes
SHA-256: f0090f873757aa789b04d9efd5ae9a7ef43cffc21b4d77972e205716472eeb72
font_02_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 16928 bytes
SHA-256: 46334110f8bab5af3fe76d5f7544bcbded741ae1596ca4526c9b4a59217383d8