Malicious PDF — malware analysis report

Static analysis result for SHA-256 165f8914cadb9701…

MALICIOUS

PDF

72.2 KB Created: 2021-09-03 06:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 270fb6c35e8a0d837fc9c1ee07712b37 SHA-1: 7ca164f666e2af6125ee0f5ece6de05aa73fb3e5 SHA-256: 165f8914cadb9701b8d5245ccb4a888d2c18fa8ababe0ba60223e4324a74b9e2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites.

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://tranhdaquyhn.com/uploads/news_file/kozixovabisivinekironar.pdf In PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7144b1bd62---marotare.pdfIn PDF document text
    • https://senhewood.com/d/files/97957616275.pdfIn PDF document text
    • http://charivne.info/images/file/feseperorupirumigovifomaw.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/gelawamarowozemaxuwulev.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/efeca43553df2150227b10f7d6766d58/fajakemedek.pdfIn PDF document text
    • http://lamay.de/userfiles/file/49763344405.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7a3b061f05d9e0910ad3de0a6971aaaf/30751374896.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608448ca63307---xotumatojawopadofowajebuf.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/dugexotixaxojidiwod.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dba10a3554---bovefadojavo.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/zelidinerexena.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/rixoginapogovi.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/72114061644.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace5c408949---78028796955.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/joguduxigodijujimupa.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/vofegojipijolo.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609833a0c5a4a---nexarisubiduvonigonoda.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/22027520597.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/68971965375.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/88ea40c24adc306cfe6fd1de79f1fa11/kufotazereba.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a7f69994c---796593085.pdfIn PDF document text
    • http://com123.vn/uploads/file/tagovabujojikijilakozowe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160772a8237740---tibaz.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/28548075182.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/67694371154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=church+organizational+chart+pdfPDF 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_off0000bba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA6 10792 bytes
SHA-256: 285b3e228386f405b03814f5e4b253843f033f8e2ea6103f04ed95909a2ecc5e
font_01_sfnt_off0000d442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 15488 bytes
SHA-256: 501319f918f4b1cfdc7c9f24122a65df97375315522e50b44086f95480ced928
font_02_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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