Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e38630fc7b1fdc…

MALICIOUS

PDF

74.3 KB Created: 2021-05-14 13:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8fb3913274c61fa5a04eb8113f04f91b SHA-1: 60ed3290776b927c5c627ecd3c48de232ba0aef8 SHA-256: 46e38630fc7b1fdc2148457133257a4db5bdc22083950443a7a83ecbba59777e
186 Risk Score

Malware Insights

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

This PDF sample was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to disposable domains or link farms, suggesting a phishing or redirection scheme. One prominent URL is https://ponafet.ru/strik?utm_term=rc66rx+remote+control, which likely serves as a lure or initial landing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=rc66rx+remote+control PDF link annotation
    • http://zirirukefup.22web.org/agriculture_class_10_notes_questions_and_answers.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/wukovi_wavopuxasogak.pdfIn PDF document text
    • http://foteraza.22web.org/22554527720.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/12311687399.pdfIn PDF document text
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/wegusolurolu.pdfIn PDF document text
    • http://radanukodufam.22web.org/blackduck_lake_mn_fishing_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_323ad43dde034f0c8e68e71d8b89b444.pdf?index=trueIn PDF document text
    • https://7920a853-f458-4dfc-a893-f50c3ed6f780.filesusr.com/ugd/fe7850_8fa21ac748d749f196502ec5e9bfb0b8.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_338e8306ef6547ada1b74be33f7fb28f.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_d9ac21bb509549368f2c699799e8c721.pdf?index=trueIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_68fa0470c3ba4e02bee24ab19efc9431.pdf?index=trueIn PDF document text
    • http://wixudilasajigil.rf.gd/jamajinezegemekavalubezi.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_957851b0649c40a6a69281b2339c0d5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/78515517319.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/hybrid_topology_advantages_and_disadvantages.pdfIn PDF document text
    • https://a61caf30-da88-4f91-a3ec-ebcff45f68d0.filesusr.com/ugd/0010c8_2c8c15771f1d495989cf22b2c453edc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kafises/when_girl_hurt_quotes.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_e872a742e57e4465bee0419ee5dd5f80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/ruvowov.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_eee2d22f8af843c69bf73f611e9b33a6.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_off0000e4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 4788 bytes
SHA-256: a585086a401de0c3373cd048c202b1066dc688789566b2ef7b470f398fff0713
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 11532 bytes
SHA-256: 7639fe956cd4ca5ab738e0ad0087311a77fcbfd1ff5238427d6257e3cef381c7