Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb5576ae0e7cdf9…

MALICIOUS

PDF

114.5 KB Created: 2021-09-04 13:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0c02d9c04bcaeb3ef676bf008381ff0 SHA-1: 595e2f7891748a3b9240192ed1232acd9c21203a SHA-256: 8cb5576ae0e7cdf9c2fb99b4555b7ea43d4188929fa2c296f16d561b09420b01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of numerous links suggests an attempt to leverage multiple domains for evasion or to host various payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=planswift+9+manual+pdf PDF link annotation
    • http://alexlunacoach.com/img/editor/file/kipifo.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/baganuwamepojabanumu.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c147fb42a7c---bafaxiwo.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/17681241405.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609838873284f---39897948971.pdfIn PDF document text
    • https://purefeeling8.com/data/file/18667320991.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/trkbojenqll291sbb8povsvucd/talobi.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/18117543260.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/28446604438.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bs24n02aunb8tmkk37l9cl3ut1/16510874769.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/57991624528.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/rojofekutoje.pdfIn PDF document text
    • http://www.bash.cl/media/file/xibojudev.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c4193b0a43d1e9e24f00988da2a6a723/8865721453.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f773ae7bd9---63471633386.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e93f120b8---77199326350.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705df4a1487---33780157651.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16120110626172---84029328668.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/wemexibixixijebonodazav.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b55a1b41---45103195275.pdfIn PDF document text
    • http://nemochem.cn/upload/files/kipeji.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/rowifalinezusevagufolajer.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e6d08c044f965b949412ea5aab5478db/96894606213.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_off00015b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B85 10664 bytes
SHA-256: 440b0657d92c0c78b8a053afd0a117507ea7064d9c230153b4711d43dd28c020
font_01_sfnt_off000173fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173FB 18508 bytes
SHA-256: c04a13238e8bc809743c8e55c1323d5797a496a1049ac3a3b09e349b4c83a45c
font_02_sfnt_off0001a48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A48E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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