Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eaff15e86c3ba6…

MALICIOUS

PDF

74.8 KB Created: 2021-09-30 23:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e5b06a92e6534f0005592fc4e9462e62 SHA-1: 2b17c9f3e7463d5c3753a13f775fd17df1a07dfa SHA-256: 69eaff15e86c3ba6ab5f8e107a56dbcb4059e1ef47307c6574982deafd6b7d58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to lure users to malicious sites. The document body was unreadable, but the presence of numerous external links and the compromised CMS upload heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161480e9d44e35---56098652378.pdf In PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/5256631670.pdfIn PDF document text
    • http://zl369.net/userfiles/file/7610786118.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/jetibuxo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/oue55m4gnof9hnjc7f5kh8ms83/sedadazi.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/sepaduzunezuki.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/30343941009.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/83888605238.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/50690061843.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/72412856394.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/71415404580.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/bodutapaduzam.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/71126061974.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/luxojuguxagedawabatigix.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/48585925392.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210928232554_584018.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/4148631451.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/bewafetevapef.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152dbe2850f1---16262613230.pdfIn PDF document text
    • http://grancanariacomercio.com/documentos/file/10082587550.pdfIn PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/lewal.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/29340383979.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/fekimoguzomuvapav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=odia+video+song+download+mp4PDF 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_off0000bb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD356 10792 bytes
SHA-256: efda23ce289699aaab71882467a79ab1d9e614633f1a5283ae277ae44a0bad96
font_02_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 18920 bytes
SHA-256: 1210637e43033134f82f6f92032e8a4382bb32ee32cff48ba7641ec57d811e66