Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2590f3046b12d0…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 10:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e96e6fdf9892607a910c0806f1ca25d5 SHA-1: 440234cd4e98147c73176c2ae0cfb473c9c4999b SHA-256: ea2590f3046b12d0867568f9af626ab993035da83da333db183491e94629f9c2
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, appears to contain keywords related to search engine optimization and potentially lures users to external sites like https://mezovuduw.ru/aws?utm_term=best+fishing+bait+for+redfish. The presence of numerous PDF links and the ML classifier's high confidence score further support a malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/aws?utm_term=best+fishing+bait+for+redfish PDF link annotation
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/xalaguja.pdfIn PDF document text
    • http://muvibigi.22web.org/wozivavoladapotaxowu.pdfIn PDF document text
    • http://niginotan.22web.org/schoolhouse_rock_live_jr.pdfIn PDF document text
    • https://nesexije.weebly.com/uploads/1/3/1/6/131607346/xowarur.pdfIn PDF document text
    • http://sejapamuji.22web.org/63836035192.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/kisixugisoritu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://didigixi.rf.gd/is_baby_vicks_good_for_congestion.pdfIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_17e608f0d8184e83a3d4af2bd04ddef1.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_67d3da1e09c54942993ffbc8fc61c24a.pdf?index=trueIn PDF document text
    • http://xorudolowipax.epizy.com/adjektivdeklination_mit_nullartikel_bungen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e79b04-8f06-4ba9-a132-ef7b9ebde776/what_is_capital_and_revenue_expenses.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_5fc0f919fc7345bf83d91d9a413f01f0.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_a4358e9c9271465a988a43560a36de99.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_abe345263f6f4352bb581014ad8d2135.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bac973-5303-4141-a523-43fc2d3f0a87/2931246620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c98f0c2-16de-41a6-807a-df498cd64bf6/what_is_the_history_of_math.pdfIn PDF document text
    • http://puxudodasak.rf.gd/wafilu.pdfIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_db4b15f2c21344d7a7b41613d665e0c7.pdf?index=trueIn PDF document text
    • http://sulunaza.epizy.com/pagifoje.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_5d94154d09bc4514825e955ff4394ab7.pdf?index=trueIn PDF document text
    • http://kijurisotam.epizy.com/69285832474.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 5116 bytes
SHA-256: 6a65bb3916c8f312d5ba38c569bcf35f78d9551df65262d31c362a4b0d1d0e00
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 11248 bytes
SHA-256: a46a14418440fd1bcd307cc90b1ef65c7cbe19ba7c6be19d531ad6e38ec28033
font_02_sfnt_off00011c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C36 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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