Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceed211530e00ce…

MALICIOUS

PDF

73.8 KB Created: 2021-06-02 14:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b97a106b3fb7277d215e1df8e81f479a SHA-1: 491cacb4eae3150b4adffc7e91d0f1d6de91a37c SHA-256: 4ceed211530e00ce85614d7ca4b9648e888a1273a42b6479fb958b4bc15daa8c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a significant heuristic firing indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a trojan. The primary URL points to a domain associated with a link farm, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/pbw?utm_term=dragon+ball+z+budokai+tenkaichi+3+ppsspp+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460070/normal_5fcef8475243d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_6067675f5c98c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_600697dbce79f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_603633ea5a551.pdfIn PDF document text
    • https://gijepunudadolow.weebly.com/uploads/1/3/4/4/134497403/565d804b2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_604cfb3b386dc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4393209/normal_60b30d1436c79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481157/normal_5fe1faa19166f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_601ee2acdf95e.pdfIn PDF document text
    • https://kipobibupu.weebly.com/uploads/1/3/4/3/134367270/xaboxebo-kinosexujorukaw.pdfIn PDF document text
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/893c8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_6042ee62d45de.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/vezanuxewuror-risixovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_6041b694aa513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruwomodanom.pbworks.com/f/69279980530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d4291d-602a-4772-98e5-f8a65ca6efbc/92520743908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db99f814-fc90-47e3-8703-c80430dbfa45/who_makes_durostar_generators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6b31d6-f329-4491-8474-204f1ae745af/64035135558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2231ae91-2d25-43ea-a5e9-875e32de0167/massey_ferguson_65_parts_manual.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144494712/bubble_shooter_genies_mod_apk_download.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/wegikobitiluzex.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 5752 bytes
SHA-256: 82d297fbf8921c230bb46638391e757c206fe40851632628b1d71b51b11c3781
font_01_sfnt_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 10744 bytes
SHA-256: 159865149489cb96f605092f11242838d206550ef942c908a6d06ffd62f9e198

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