Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade69da157a7d86d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 11:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 57c97eb9a753e57f32163c485510c7dd SHA-1: 64ac295e43c4649bd34098c3b6be9e5af3363dfe SHA-256: ade69da157a7d86dd591824fa47442024f13d21a67c09d5e6a2a11a22a97ca6a
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links pointing to external domains. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware delivery document. The embedded URLs are likely used to redirect users to malicious sites for further exploitation.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://zajinet.ru/wix?keyword=crisis+core+psp+guide PDF link annotation
    • http://jidapuxedepu.medianewsonline.com/vegofegetigenonosude.pdfIn PDF document text
    • http://wersita.space/mp3_bandar_baleelayhnzn.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/batifoxugujegobop.pdfIn PDF document text
    • https://bavodujamula.weebly.com/uploads/1/3/4/8/134855902/nidibumonon-rovegazinanujix-zedeka.pdfIn PDF document text
    • http://managerprogram.live/271238807380v86i.pdfIn PDF document text
    • https://jibarekoruw.weebly.com/uploads/1/3/4/4/134445620/futow.pdfIn PDF document text
    • http://tramlaweq.online/44800733878jvepo.pdfIn PDF document text
    • http://nncucuucuc.space/battle_angel_alita_last_order_mangajstc9.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/wolodipupax.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/sivanira/povosemufokizufeforupe.pdfIn PDF document text
    • http://tiwogiponifi.rf.gd/nanize.pdfIn PDF document text
    • http://lunofalogejutu.epizy.com/bholi_si_surat_video_song.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/bopexezajopawuvawopozer.pdfIn PDF document text
    • http://dizoleline.epizy.com/sql_basic_books.pdfIn PDF document text
    • http://fevidubigozexa.rf.gd/looking_after_the_environment_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/96729822578.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/zojezexinitonen.pdfIn PDF document text
    • http://pekufupudemolor.epizy.com/xibafutumajufetazigom.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/57604317069.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_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 4904 bytes
SHA-256: 14395f8eec5a0eff721d8000999e70eabcd7e13cc17a16b177f4d6b7d9078a69
font_01_sfnt_off00010281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 10708 bytes
SHA-256: acbdb0e217ac7ab759eb98f3978c40acaa767fb5f1ea60379dd8441002c25a79

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