Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a2fbbc82742871…

MALICIOUS

PDF

74.3 KB Created: 2021-06-14 22:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7346f7ea159c50d4add840511c4fe89a SHA-1: e408b9dac2a6eddf879788f8452811710aaa35e1 SHA-256: 68a2fbbc82742871a1f50234ed521588459f83cd271b59518f1d40fce4cc4ec4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple links on disposable hosting and the use of UTM parameters suggest a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=crossing+field+piano+sheet+music PDF link annotation
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/93ca0231b7f0070a57f2c3136c2ea65a/vesixozukelifigusar.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/3869556352.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ce36b9c4e1e9a730a3c1c0c451236ea0/gamepawasupotaj.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0c2ad5d8f---xerokuzobi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820745e4491---xozokanarabe.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/050632232071.pdfIn PDF document text
    • https://songuryazilim.com/calisma2/files/uploads/bakatovevejoxizipere.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160769bb7d56de---81482837265.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f853e764a3a4a8d86a54ef53af06f554/zuwelevemenevuzij.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/28c5dd25e2c61a56e595f1c94c21ef2b/81402128805.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210517180654210695660.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/68a8d3bbf29ca80c77a0bc132ea5a689/xanejugijefogaratiwa.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/pabigexaw.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210602_021309.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/49716992374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 5476 bytes
SHA-256: 66b9b6a15e5b10365d43b9db6b077bd1d9b9b03601679d46474984e371516442
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 10844 bytes
SHA-256: 10eaa18fea3f904e2e52d86dc67d1faa7a3f70449e22bc645325384d7c8b88dc

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