Malicious PDF — malware analysis report

Static analysis result for SHA-256 40df1fb198354d6a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 03:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2cfba33c531aafcb6e69a9e4fb580b94 SHA-1: c89fa367502399b9266c07a9770d1cc1d85eb5af SHA-256: 40df1fb198354d6a8b8fdd5ea9d191c5af75e8001a9444c1cbe7e8af98921a25
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm, potentially directing users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links further supports the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://cructi.ru/uplcv?utm_term=green+farm+3+play+online PDF link annotation
    • http://immobilieninvestors.org/userfiles/file/mujativu.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/sigiranejevefadixivom.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/mitamusirot.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138fe79d846e---folutarozig.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/72978447488.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/7753537342.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bdb5129a5---86749743490.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210902145838_49pfz1.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/fozedexu.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210903_031208.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/74239951627.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/kuvuzapivafopojipumenevaz.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/xerosulobijobaso.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/86508821131.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/berajowafinotoxesukired.pdfIn PDF document text
    • http://cwesp.biz/upload/file/80948305824.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/puzigorevojesif.pdfIn PDF document text
    • http://apcmagon.com/userfiles/96604078620.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8087534c---jepuwavixupirevufe.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/xobumegawajisalin.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/biwuburupof.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161394186e0629---gafifa.pdfIn PDF document text
    • https://yuktogel.com/contents/files/bideposidobabovunopuvev.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109081831353149.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/91258054077.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_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 17984 bytes
SHA-256: 0211490099ce738adaab4f1e6845a3d8c0e0713e5726b74a20877f201f43c296
font_01_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E9 10576 bytes
SHA-256: 738e4e3edf953a48323b4052cead5544cf7af9a05cd2eb5df906a8d8462d9bef

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