Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be1ec996c84f114…

MALICIOUS

PDF

75.6 KB Created: 2021-09-03 05:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 567096262569f8a878d24b12b705cc0f SHA-1: 2d0815a3ac346fb194bfd28b190d368145703c91 SHA-256: 2be1ec996c84f114d4746629764573eaaf091deecb182d3b304be60c32aa611a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://philabc.ru/uplcv?utm_term=2013+harley+davidson+iron+883+service+manual PDF link annotation
    • http://trungtinjsc.vn/upload/FCK/file/zisoto.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/pulutidumubejerefo.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/39612403504.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/44247202848.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607edf239c7e3---27647686981.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/vivasibudesip.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/30368685219.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/kedaribekifamedogedopife.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089d3f2911c6---wofebulajunogifezobejil.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6c3aeedb---bepini.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b5c26ac7---68853861281.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f87361c677---82515300086.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160828612612ba---74652859697.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/legirizulevamiwunar.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/59174164b8d9021c1a0bf6a9f4d0413d/43566546786.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73003eb8fa---64061025192.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/30434226829.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/bigaludawuxomovofaboxomus.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/97609127438.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16112bad535e86---55597238273.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/xeladajaj.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c42e63c3d---japonawi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc1517c30---10839326308.pdfIn PDF document text
    • http://sciattella.net/images/file/duzekijulibojoxepodu.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1629273670.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5f00e76e0---xizuvosofugisinufebu.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_off0000c107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 11396 bytes
SHA-256: 6cdbc040a83e6f0ba28da1ff95d7e5aee4e0bedc82fd6145389853ceabdf19e1
font_02_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 17600 bytes
SHA-256: b01e64c016e38b9f2f33bbb66eb8784f5f74851a154750a126ae23f8a4071e5a

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