Malicious PDF — malware analysis report

Static analysis result for SHA-256 0460dbdb56c9d8ae…

MALICIOUS

PDF

78.4 KB Created: 2020-12-30 01:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f75d3da543c36d2d30c779800bbfed56 SHA-1: 21fac5d7fb8ea8f8c3209e20b1430c2b3970f7b5 SHA-256: 0460dbdb56c9d8ae3cd4e0e67ab48ed50618076938404d69acb79f5e823a5744
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffnew.ru/strik?utm_term=bubble+shooter+snoopy+pop+bubble+pop+game', is presented in a context suggesting a game lure. ClamAV and an ML classifier also flagged this PDF as malicious, indicating a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffnew.ru/strik?utm_term=bubble+shooter+snoopy+pop+bubble+pop+game PDF link annotation
    • https://cdn.sqhk.co/fumazuri/Ighjgfc/dolugemevine.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/bidicRj/67340863871.pdfIn PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/kemurabutak_zepulakaluzofo.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/WgjDsdu/laroguxaweredomafezel.pdfIn PDF document text
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/zovaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/aVijkgc/tufenutasemigevaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8ff9c6ddfff.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/hHihhbp/duke_women_s_basketball_head_coach_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/topedimerab/EgOhiSq/city_car_driving_2017_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/gifexajed/tvifbhe/sky_q_on_2_tvs.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/3ji5EEN/silizas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f8b2d43e04a5.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/hdggKUx/courier_services_near_me_ahmedabad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/95934336017.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/pumipuruso.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/41498036203.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/jodovigikexedew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 5524 bytes
SHA-256: 00cea18e2c1462efd3c08019d22ea3e98a13562c5a8c474a62bc411b62c307de
font_01_sfnt_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 6124 bytes
SHA-256: 2b652f56c1fdcf2489331f56573a90d92970cab21198c63800159890b7d0a151
font_02_sfnt_off00010696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 10392 bytes
SHA-256: 0112f7f8193f8f550c238163ca1a627056e06352f20a57885fc3e39aad181bb4

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