Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3949b990438b5e1…

MALICIOUS

PDF

164.4 KB Created: 2021-02-15 05:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b4f51bbca175d9854f0ecb866fd0c8f3 SHA-1: 833c25f7f6c6cc051a96d2033c41156835fadcc0 SHA-256: e3949b990438b5e1a001dcd5b46ca8da0e3b18a6c3ef1ae6376e3159536ded11
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or malware distribution document. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('baarspo.ru' and 'palumurawisan.22web.org') that are part of a link farm. The document body, though heavily obfuscated, appears to be a lure related to a school supply list, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=myrtle+place+elementary+school+supply+list PDF link annotation
    • http://palumurawisan.22web.org/79296924770.pdfIn PDF document text
    • http://brumbum6.xyz/zejugafufafarnthdv.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ahMghii/video_player_android_github.pdfIn PDF document text
    • http://supermagazforsale1.xyz/rise_up_lazarus_cain_videojovnh.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/t06ggii/3478863612.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/6Rnhahd/tsuneishi_heavy_industries_japan.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/ejdjblO/mexibanu.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/mejobipovoketikazavaredu.pdfIn PDF document text
    • http://lishop.site/vogadunitetifexujobewuxfp9f.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/TnvhdEe/18289365433.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/6p9j2FU/98932368408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lijizuzinarit.epizy.com/cetoconazol_bula_creme.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/hempathane_topcoat_55210_product_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/iufd_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/vcredist_microsoft_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/nupepepodolasojobifakof.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/conversion_of_units_of_measurements_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D9B 5280 bytes
SHA-256: bf63326bf55c0d44a9a7f8ed1d2351beb36af3da2a5d8717966afc0930138872
font_01_sfnt_off00025f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F74 10592 bytes
SHA-256: 547df3924986f34bcd24cdd78de39155dc420c4dbce807e0b6a859c31d207ed3

Open this report in the interactive analyzer, or submit your own file for analysis.