Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4535faf6d16126…

MALICIOUS

PDF

87.6 KB Created: 2021-02-24 22:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2a939ede59052692b17982726dfb63ec SHA-1: c4651f95a9b4663dd1e1582660e80fa775d29d90 SHA-256: de4535faf6d161261d4a84904118716afd578627211302a2429389824924c078
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely intended to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI is a primary indicator of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/123?utm_term=what+is+another+word+for+remove+errors PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fe3979f34611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418197/normal_5ff1155a1fe3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_6014bae626f48.pdfIn PDF document text
    • http://kazerurido.iblogger.org/21276000380.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/8fd715b78ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besigaku.epizy.com/53294538165.pdfIn PDF document text
    • http://zideniniwos.epizy.com/graphical_method_of_adding_vectors_worksheet.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/69317886947.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/ccproxy_8_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/74981634851.pdfIn PDF document text
    • http://nanaxaj.rf.gd/dog_barking_wav_free.pdfIn PDF document text
    • http://ravesezubepad.epizy.com/choodiyan_official_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/83197945263.pdfIn PDF document text
    • http://jatomije.rf.gd/nevivazuvokalol.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/76158283577.pdfIn PDF document text
    • http://pasudef.rf.gd/fewavosirorogonus.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/favovobofutuvowepewoxo.pdfIn PDF document text
    • http://zabusokaruzovi.rf.gd/android_turn_off_bluetooth_auto_connect.pdfIn PDF document text
    • http://nununad.myartsonline.com/xufabedinekukada.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_off00011b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B22 5280 bytes
SHA-256: 889af23deed62799f5ea49036d58d762899a4a70ccccdbfb5ae127b66c300fe8
font_01_sfnt_off00012d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D06 10560 bytes
SHA-256: 17b4087cdc412acd8380ee83989978d1d0ed6b4bbdd31da86c69eb3aa23aa80e

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