Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3be5ddd3ef1334…

MALICIOUS

PDF

88.7 KB Created: 2021-02-20 14:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 654f709a11b1fd08caa1065538f5e7f1 SHA-1: 599cd176f7415ee71de7301b288d845fbbbf8cd4 SHA-256: 7e3be5ddd3ef1334886f502f2398bca9dadb030952d8837e7fcf89cda533cbdb
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a 'warranty deed' lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=warranty+deed+in+lieu+of+foreclosure+westgate PDF link annotation
    • https://cdn.sqhk.co/dijadive/gieicgj/26619577376.pdfIn PDF document text
    • http://importants.space/ns01_nominated_supervisor_consent_form0maac.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/p5jfYig/minecraft_pe_flat_village_seed_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483081/normal_5fdf328cc3f21.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/eijiijc/gumball_voice_actor_minecraft.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/wudufafomojubibup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fca42d17e015.pdfIn PDF document text
    • http://bu-markett.com/cen_tech_62120_software_updatepn7g9.pdfIn PDF document text
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/tuvesegezu_modananazuruwub_buvituzolibinu.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/android_sdk_location_whitespacemgn5h.pdfIn PDF document text
    • http://maslovauto.ru/ruwufipufunapmpau.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_60154ab14f92a.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/jogarijowepego-zoxadusijolu-widegakiminip-sedakuxif.pdfIn PDF document text
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/dizatum.pdfIn PDF document text
    • https://kekebamifibem.weebly.com/uploads/1/3/1/6/131606854/7443928.pdfIn PDF document text
    • http://cooldomen.space/sorepilakujotozasg1upz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366313/normal_5fcdd6b4bfa95.pdfIn PDF document text
    • http://nanolenka.xyz/13065109170a5ama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/vegebajogelowuxewaguv.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/13943984156.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/gdb_backtrace_format.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_off00011cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF4 5396 bytes
SHA-256: 28cd606faf352515671f50482a3416fff908fb699f5d668fdaebc68bdb5d4381
font_01_sfnt_off00012f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F81 11136 bytes
SHA-256: 705915f928387e3b426ccdf8e501810d5db860a9abfbe5c4eb4b2b7435fe1b75

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