Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fd410677aa3cad…

MALICIOUS

PDF

77.4 KB Created: 2021-02-28 15:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c30593084db54205eff15135a6c38ea1 SHA-1: e7f76f2e0a1a533cf9ef15da4b149443b10dd3b1 SHA-256: 44fd410677aa3cadb37db0cd5ca84fc8d255a353cc4bf23bcf5553458175111b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://pelibifir.ru/123?utm_term=pearson+edexcel+a+level+biology+past+papers', suggesting a phishing or malware distribution lure disguised as educational content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/123?utm_term=pearson+edexcel+a+level+biology+past+papers PDF link annotation
    • https://cdn.sqhk.co/jakabapewuv/E9iaQmf/6313442873.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/EQjbfhg/tour_texas_a_m_commerce_basketball.pdfIn PDF document text
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/sinogos-gujedan-letawato.pdfIn PDF document text
    • https://gapibuxox.weebly.com/uploads/1/3/2/6/132695643/tejep.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/mekurado.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/fokuxobusilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe5c16481c5f.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/ccna_v6_lab_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6014c36946e71.pdfIn PDF document text
    • https://rizaxulizogi.weebly.com/uploads/1/3/4/7/134753796/91ba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467278/normal_602d4a285a43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_6010fcc753940.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/WjgjBgi/hitting_golf_ball_in_water_hazard.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5ff5466457d74.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/mubetu.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/jdgfhcj/paris_texas_shopbop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupavopixipe.epizy.com/78524419927.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/75403155053.pdfIn PDF document text
    • http://wemiwapava.epizy.com/crinkleroot_s_guide_to_animal_habitats.pdfIn PDF document text
    • http://merofis.epizy.com/90082650304.pdfIn PDF document text
    • http://waketekedoveke.epizy.com/vofatamizuwazo.pdfIn PDF document text
    • http://lemaponu.rf.gd/batigakavevurolol.pdfIn PDF document text
    • http://papujov.epizy.com/adobe_flash_player_full_crack.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_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 5612 bytes
SHA-256: 8413b38c397b3dc3cb3ce7efb214d241370cec064e9aab1f4640921c3087852c
font_01_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 11744 bytes
SHA-256: 3ecbaee6032cb982de55fd90b83740507981b85465245aced92328360a1074e5

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