Malicious PDF — malware analysis report

Static analysis result for SHA-256 0208ff2636a1181f…

MALICIOUS

PDF

85.4 KB Created: 2021-07-20 06:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e4639ad30eaff1ecec92b8777589dfb2 SHA-1: 6bff9c40399b9b0aadcde5b2ca8a1b1134f58247 SHA-256: 0208ff2636a1181f038ad8a7454ef0f202b989dca094666faa78f9b3dc00221d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. These links likely serve as lures for phishing attempts or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/aiom5gakj38lame3re677micc7/36133557471.pdf In PDF document text
    • http://teplospectr.ru/images/files/48102499833.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/18597325063.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/ae01eec345e73502b67136d190173f4b/68543005592.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608603775a689---tazanotudabekix.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/10489580090.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/livurax.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/sawikobuxofixofijumibag.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb45a284f---45052815262.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/d6d91c1a9527ddcbd9770a5da818d162/mibipovorukasuserenopuno.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/63855460292.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/potigunipu.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/d0ec1f73617bc4bd6573c1c3fdc9aeeb/71427125708.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce07d10731---51997739280.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/4f075259fd0f43b7d697488ca5e86f82/29534753562.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6b730bc7---zetexelazijedik.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/d19c607cb8ca06bfb31bd7a7930ec637/54445280851.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/16666387856.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/17302568181.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160735949edf1c---xaraxitasugofu.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/84096956615.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/wasidefuvax.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/42535774449.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210502005421774663324.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/wasujejuwumide.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+make+your+trident+come+backPDF link annotation
    • 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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 16864 bytes
SHA-256: 96c12f89a909cdda69a7b6200d4be4b2dd68c6ced627621f08b7a31044f790eb
font_01_sfnt_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F35 10840 bytes
SHA-256: ebb5b87d3f88c56683ac6078d6b39a6ddb931b1451424e3274d3019f2a503943