Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abea7e0b5a3591d…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 17:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8087938904f4e15cda53941bd6372a0d SHA-1: caf7b26c0e282869a88c19c4f8042d8e42d94e76 SHA-256: 5abea7e0b5a3591d5bd4dc1b994b50547b60926714efcecf1cc270cd0735b179
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to websites, many of which appear to be compromised CMS installations. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the overall structure and URL distribution indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=how+long+does+it+take+for+flea+bombs+to+work PDF link annotation
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609842603a260---zegiwozame.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/11770584925.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/pawalogifevefubinodipuj.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d98a009c37---18913222535.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc99b8e6b3a---fixuterude.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090582a3a3bb---wugupojobeburapi.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/lowakebu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9912adc9---63080392983.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04cf285514---4573737162.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/7c37b574f7266f0be83c6e49f875964e/gezifudikuwajebumemivuvip.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076e6fd1d9cb---55843377192.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c01571fa357ffccd66d9a228f31ac784/92479364661.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210615015545265.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7ae2e74a---wosevefubenovano.pdfIn PDF document text
    • https://isosklo.cz/uploads/3348764428.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/begofifurazezimavi.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/54662249584.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/47irnhiomg9satjalfuiurkbe2/bopapudilirupafupi.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4i0to12nqc4hrlct0tg909s5rc/dufud.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e7436c31a---bogelilekelibemamatubimo.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/at63t1gugcrgeak0m8i4lanln1/28633545408.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/wuxagetaxuxivositan.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/13329183400.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/66212318354.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_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 16764 bytes
SHA-256: 46f1d63f58743a531c06c67e80a08b9fe2e80b12e4fad9e3b0d51f7a8b9696c8
font_02_sfnt_off00013517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13517 11004 bytes
SHA-256: ca13dddd722624a305a0b45a0be91585e79a1062f4fb80635cf9767ac508c38d

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