Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1340f6e8e7bb605…

MALICIOUS

PDF

69.8 KB Created: 2021-09-30 21:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 395f0c45c05be5b6125b5ef1b7a63e43 SHA-1: cebb2ae584fe8c17ba9b147c50b50abe1683e383 SHA-256: f1340f6e8e7bb605a787796c03c8846babb29282db077fb77144d6886bd0e34a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable links. Heuristics indicate it's designed to trick users into visiting external URLs, with multiple links pointing to potentially compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=hd+streamz+for+windows+7+download PDF link annotation
    • http://sdes.in/uploads/lutebobomovazo.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/pimonanabusur.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/25424490324.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/93958431209.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39290054194.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/8326286215.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/36017374045.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/91089813019.pdfIn PDF document text
    • http://sungder.com/upload/kaxadu.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/tutipadozipatevikopileg.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/9bbef4ebeb694f7d9eb532e2f3eabc39/fepawufutufozagoki.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7f8859d40---tizazibaponupu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6de7739de---ronisigepodaxonepixumatu.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/rufetimutigugazeki.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/15909544298.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/46881533950.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/956d3f591b013374543603c806489e51/12724035247.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/korafapeg.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/pesibowekenisasumixozijax.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/53033780203.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/babipawibavuwuwik.pdfIn PDF document text
    • http://salespate.com/userfiles/file/36558017448.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/wegitulu.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/21044746450.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_off0000b32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 10704 bytes
SHA-256: e5130bc91a876b4e98d20e9739e62fd9a00b3572f5b2b20061000ee5ac6e4026
font_01_sfnt_off0000cbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCC 14372 bytes
SHA-256: 16b707379785846112f03bbe7e3529e04b8aae42aaa59eb649af3f8a47cdbca2
font_02_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1