Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90b11e42de8f96c…

MALICIOUS

PDF

273.1 KB Created: 2021-02-15 07:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2a69491c9d1803f4bbbaab63100f6f7f SHA-1: 9bdbf692545c710302177e7a8c2e04e061dbd435 SHA-256: b90b11e42de8f96cb57515fe609873fd47c73c88a5be02127993619fd2b1a1c4
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://seumenha.ru/aws?utm_term=cisco+aci+design+guide+2.+0', which is likely part of the phishing lure. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its content beyond the embedded URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9854

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=cisco+aci+design+guide+2.+0 PDF link annotation
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/4940298.pdfIn PDF document text
    • http://cartest.pro/1697052348r0rl1.pdfIn PDF document text
    • http://migriruy.ru/inflexible_yogis_flexibility_guideyvxls.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/69027cdba7fd.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/pekujel.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/jurore_gudofuli_nexesaluzaleg.pdfIn PDF document text
    • https://leruvipox.weebly.com/uploads/1/3/5/3/135347136/dazivo_juzitanifobix_lagosepap.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/5253566.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/5842144.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/benuka/norofemeromikuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/tesumatajowigubigil.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/92282480804.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/dividing_decimals_worksheet_fifth_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/kanel.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/ethiopian_orthodox_bible_in_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/39552647627.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/sutukonoxalupeno.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_off0003f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F93B 5188 bytes
SHA-256: 51a3e814970f79b7ea846d0aea59ce61de5803b4edc3e18a229f76ce77076f5a
font_01_sfnt_off00040afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40AFB 12152 bytes
SHA-256: 81231dbf7e29dcaaaff20a96e0d744d5cfcc7c1dfd8728685397a5b5b5fdeb99

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