Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab8ff89038d778e…

MALICIOUS

PDF

102.1 KB Created: 2021-08-02 09:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 701a4ad8395ba6c436a7601306396856 SHA-1: 738908012a23a730485b2d816ddacbcd19227bc9 SHA-256: bab8ff89038d778e8b70d34cad3377b5a1fcc81ac0abaa52e6305a0c6677a25b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised WordPress sites. The primary purpose appears to be phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://crysiq.ru/uplcv?utm_term=carrier+weathermaker+8000+error+code+31 PDF link annotation
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/nj3nth9djsl51bkuslsb3qjee4/79090949999.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/61816050755.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/47850047210.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/rivuxomomebu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/n90cg4cn8ko61bkcc34297hdgc/ribazolenuba.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/mivuwubinizeronijusugak.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5200d531d---98629352911.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb7fb1bc34---87194902995.pdfIn PDF document text
    • http://gtshotel.it/images/file/84777092678.pdfIn PDF document text
    • http://yepuco.com/uploads/files/fubol.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/562585a46048cbbf85ccb5f5da685e78/43511673948.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jejasojamab.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a8fc9e20822243b5bd5e0b96646ea855/fikutiwofalavevox.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210731075216.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/64862709944.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/89525066266.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e68a406f1---vutibelavix.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/45964969313.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/40062999549.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/zovaxijatomegise.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/74605016534.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/s61di5hkuhuhdplf44c2vbgfoo/sisamobonimufubijapa.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fizerekugiruj.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_off00012918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001412f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412F 11080 bytes
SHA-256: e2b727091787086071e3a333d16aaba81ee269e213cb9478c3c04317eff9164e
font_02_sfnt_off00015b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2C 18248 bytes
SHA-256: cb57fdf0a519637f4ed7f6a41940b47e223eff5bb8dff5a42e5b9e6598eac8d1

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