Malicious PDF — malware analysis report

Static analysis result for SHA-256 295699046be6160e…

MALICIOUS

PDF

117.0 KB Created: 2021-07-31 14:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca1486ee6ba83fda0764d60c6944e891 SHA-1: c16d7950fb593276042ffc84e30ec5738b96edce SHA-256: 295699046be6160e4241fab3ac71698bd064c4ade3d966ec23c68c2441b59e26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://medvor.ru/uplcv?utm_term=principles+of+helicopter+aerodynamics+%28cambridge+aerospace+series%29 PDF link annotation
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794c54a5cb8---bonemokegibomakawu.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca34cee74a---juwadimizitabagan.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/391520b1cb45906850013e609550155f/27357674085.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kkqdio9a4sf0ak4pn15faucsg5/guzazir.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/nevotegibutazefos.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70a42a9119---demoraguxutoratekirejilo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb141663e---zefuvovozemin.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jj38r1p32vp12mjub4888qfo53/wapumatuxiregemak.pdfIn PDF document text
    • http://firegallery.ru/img/upload/96971869282.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/94f5t1or8dc2t44lathujmp82c/devuso.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/35441046576.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d10b360f48971b9f573df324cbe99afd/wosikowosonipidojikivodor.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0c71b3b7---30962411136.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210718093654.pdfIn PDF document text
    • http://erictex.com/ufiles/files/jefefiz.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/s3lk9sdk09dko35dau6o5bs0d1/50634003371.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/18783592336.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0708e7d8---widiliseb.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8352a2851---budetawogo.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/vomek.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b1ce79ba7---zunemo.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f02d032dbf1bd01d8a0565c644946faa/22817940939.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E5 11476 bytes
SHA-256: cd1bd90304b3ad246a34a45448a765829987bce6a30a9e66fb7330788d80ba6c
font_01_sfnt_off0001738b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1738B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9D 17328 bytes
SHA-256: 536a21faaee4a80b915c4166bc86d40b3f957c938c6efe9d73f4241e91e2dd2b
font_03_sfnt_off0001b908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B908 2576 bytes
SHA-256: 1f243aa6d6f27c499f5ff569f4bbe6609bb48eb723eb96ba3eb7286be48bbc46

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