Malicious PDF — malware analysis report

Static analysis result for SHA-256 41de4ca41af0a952…

MALICIOUS

PDF

78.6 KB Created: 2021-04-05 00:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7ff6bf4630e45b8b68dd9e47b7915f41 SHA-1: 295e24245920488598337528e45b6af480b1b207 SHA-256: 41de4ca41af0a9529bef47776a81031cb8494c5597b1abdf6d2b39f726c1ebf5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file 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 hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated but contains keywords related to a threat, further indicating a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=nashville+school+of+the+arts+threat PDF link annotation
    • http://zomixuxoluzijum.mywebcommunity.org/variance_analysis_actual_vs_budget_with_explanation.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/2017_lexus_gx_460_luxury_features.pdfIn PDF document text
    • https://vowemiwa.weebly.com/uploads/1/3/5/3/135392560/6036714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_605076c014425.pdfIn PDF document text
    • https://fezivalolir.weebly.com/uploads/1/3/4/4/134461714/4077668.pdfIn PDF document text
    • http://nodozavi.iblogger.org/queen_platform_bed_with_wood_headboard.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/vofelajujax-taterivufegaxep.pdfIn PDF document text
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/8fd34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_6067cd8d6b3ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365620/normal_60001163865e7.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/definition_and_types_of_democracy.pdfIn PDF document text
    • http://pagexonani.iblogger.org/delhi_bus_route_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_3f699b5c3a344734a4d3e58df62842c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/323d4a5a-d141-4085-a009-f841f4533865/87883526944.pdfIn PDF document text
    • http://jikokajogov.rf.gd/janapada_kannada_movie_songs_free.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_8b2cced3d9f54040b348f1842d506840.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21732d08-5b68-4f4a-a48f-5d513e9d36ec/tabla_distribucion_normal_selectividad.pdfIn PDF document text
    • http://sumorililuduj.epizy.com/65161251291.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_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 5000 bytes
SHA-256: 89022fa44b010522df54741e5183d053b043a331a2727ef66e5fed8ae50513b2
font_01_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 10636 bytes
SHA-256: 28aef1cf759813c77947accfcc8ca8ff5f2d41fb8b977e4f754fd2d46b33da94

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