Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabaf5339d5bd786…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 08:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2688ea7748035f07965309aca567725b SHA-1: 59ee64995002493fc496144fa840e1e0c1ed54e8 SHA-256: eabaf5339d5bd786001ad9d93a5a8f1bba85e71e3956a620d6afa889647f27d3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

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://midufefew.ru/strik?utm_term=sig+p238+vs+p938+recoil PDF link annotation
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/nifokasokum-taluvajafule.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/g03hggi/mafia_city_ps4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/jfFZWgh/best_songs_of_john_farnham.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/what_are_the_cube_numbers_from_1_to_1000.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gfcgcig/minecraft_dungeons_update.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/760aba.pdfIn PDF document text
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/6358749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gezexibubaju.rf.gd/4_main_branches_of_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/95688508787.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/brasil_tv_apk_mod_hacker.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/pefudibidopiba.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/dowomavoki.pdfIn PDF document text
    • http://rivebop.epizy.com/chitrangada_bengali_full_movie_hd.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/mijibakiwimuzaxipofosaj.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/cuanto_es_100_gramos_de_mantequilla_en_ml.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_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 5700 bytes
SHA-256: 670d8ebba130c1b01670f9a9558067dd668e4c01d23d81aaa792b92608b18dd2
font_01_sfnt_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 11260 bytes
SHA-256: 5df6a94d9b5aecd05420865736100632af76b2f4b64ad7c7c9c1b7fcfea7486e

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