Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47ab47566c02ee4…

MALICIOUS

PDF

74.0 KB Created: 2021-05-03 18:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6cd754736728ff1888a9a1a41737013a SHA-1: bade7280c521126ab093d1b45b99a386d4fe1bc3 SHA-256: c47ab47566c02ee4d33e0b4ddd520eb690a896b7021fb8b3251450b8ad6500df
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a machine learning model and ClamAV, as malicious and phishing-related. The document body, though partially corrupted, suggests a lure related to cooking. The presence of external URIs and link farm characteristics indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://zajinet.ru/strik?utm_term=how+to+cook+a+glazed+ham+in+the+oven PDF link annotation
    • http://gafowegane.iblogger.org/xetiledu.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/gftheVC/chaos_rings_iii_review.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/ijisjfO/mvp_circuit_challenge_2017_disc.pdfIn PDF document text
    • http://wonder-ita.space/hita_ambrish_ji_bhajan_videoqqeb3.pdfIn PDF document text
    • http://fejelomixariji.22web.org/50081247781.pdfIn PDF document text
    • http://airet.space/trane_xe90_inducer_motorg2n2d.pdfIn PDF document text
    • https://bibasalerudo.weebly.com/uploads/1/3/1/8/131857029/mixadilibur.pdfIn PDF document text
    • https://rirenumu.weebly.com/uploads/1/3/4/8/134884077/fabadagojaperoj.pdfIn PDF document text
    • http://tosezepokonone.iblogger.org/wifajorijazevofevun.pdfIn PDF document text
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/1659759.pdfIn PDF document text
    • http://avit0.pro/vagupebozexepugobefotqsaqu.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/QThizk2/worldremit_airtime_top_up.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xumasadepa.epizy.com/template_ecommerce_bootstrap_premium.pdfIn PDF document text
    • http://mawebiruna.rf.gd/novo_catalogo_hinode_2020.pdfIn PDF document text
    • http://misosemarimo.rf.gd/62743077.pdfIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_053a2c3cd64e462eab8a36e0fede4da3.pdf?index=trueIn PDF document text
    • http://zisibife.epizy.com/pharmaceutical_quality_assurance_manohar_potdar.pdfIn PDF document text
    • https://acda325f-ee3b-40e4-882f-fabc489a6840.filesusr.com/ugd/23b3d3_4f9c8637c7b74515858b49f2b818a1c2.pdf?index=trueIn 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_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 5304 bytes
SHA-256: 6a631dba118abe3ba2d79ec12d5f4ebe00843507b45659ba82aa9c9708ce2400
font_01_sfnt_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 10596 bytes
SHA-256: efa229db0204e56b8d7f6e29244d118689c4ff340fc2e9411e301d1331a6149e

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