Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2708efe9122224c…

MALICIOUS

PDF

71.8 KB Created: 2021-09-03 02:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: caf8ad628820d1cf5c13b8e7f1e5517b SHA-1: 20e18bed73df1590a30f5d8118a05ac5bf1cf530 SHA-256: f2708efe9122224c30eb4cca93eebf45a570d414fb7421fd34258ce1cf46a504
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a48726ce4---83509810652.pdf In PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/barani.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d5fdf6286e60d716beedac4349b5277c/67166724010.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/sdnshbjggtmskkoiuauhhsf0n6/zavepoxofubovokukaxawu.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce76854095---96396340807.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/bimaruzu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56b0a690b---vavavezesiwupexixanuges.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/zixevapomuvesemigadofu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c431e8562---xilebefogobibokoxibu.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/reludagekibom.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/ratepofagixobudodaruvaxa.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///bavidinag.pdfIn PDF document text
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/68028546173.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/e31f4fa146fc6a08308e22bc478a239c/memade.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/46122681172.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/roliguzorudenojiruket.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/85ac16b8fe1362f9803e97f9ff6e72a5/jimixipi.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/pibuxibagabovawi.pdfIn PDF document text
    • http://zjxfjc.com/uploadfiles/files/fewumufekegu.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/46567938166.pdfIn PDF document text
    • https://bor-diing.com/upload/files/36002588520.pdfIn PDF document text
    • https://arerp.kr/data/file///24736686849.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/lotelukixadiwuvepamem.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/87972045974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=causas+de+ictericia+en+el+recien+nacido+pdfPDF 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_off0000b50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50B 10744 bytes
SHA-256: f7710ef806966c2e60edd31079fc8cde79c29d0c23602525b77efe70d3310dec
font_01_sfnt_off0000cdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD2 16788 bytes
SHA-256: 51e521927e16f917a9aff34eb8152760efbe903ad297149605143171bc62f619
font_02_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1