Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2cc640989eaa4d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 19:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9ed32ce59bcce6edef2aa79868df6213 SHA-1: e7c7d7d4eccdd0df244096b21c940988506300e6 SHA-256: de2cc640989eaa4d6da0012f480e1f19dadd4a675ec185be83d4e87b9535b5b7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The embedded URLs are likely used to redirect users to malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/123?utm_term=arrl+handbook+2017+pdf+free PDF link annotation
    • http://itgermany.net/43182222085x637g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_600fbacb3aa7f.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/monozivubinaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5ff4cd866ab67.pdfIn PDF document text
    • http://immorta-cross1.club/mega_boy_ponte_novaav99y.pdfIn PDF document text
    • http://terem.space/94205354606evy4v.pdfIn PDF document text
    • https://refodalisa.weebly.com/uploads/1/3/4/4/134437853/7b8981ade69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_604b8616cac72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372960/normal_5fe507fb25c44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375341/normal_5fc9c04ef0817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420765/normal_5fcfb5bb56e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_600e400a1a039.pdfIn PDF document text
    • https://gilamasizate.weebly.com/uploads/1/3/0/7/130775108/dagajidomez.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/panewafes_pekoxapobitel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fd7793d0e866.pdfIn PDF document text
    • http://myfoxing.online/novujiua1xu.pdfIn PDF document text
    • http://theporte.xyz/2019_camry_se_colorsk3erd.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/jotogorurekuro/74474455075.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/wadonom.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/resumen_de_personajes_100_aos_de_soledad.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/baby_girl_song_by_cassper_nyovest.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/vimowirepozepumifatu.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/gta_vice_city_cheats_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/the_secret_life_my_secretary_berapa_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/pure_vanilla_extract_nutrition_information.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_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 5548 bytes
SHA-256: b3fb2d50627d16f10651a311b88a634f668700356ac71cc275c602081fd5db1f
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 10888 bytes
SHA-256: decfbd96f1b33b908929921231dee14a8e6d663db99db4ab51aa37c69cb26904

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