Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a67f02a69f0015…

MALICIOUS

PDF

102.4 KB Created: 2021-01-01 11:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a924ef523e036cacbbb37cf064b51222 SHA-1: df816330c09802077023294d0617f8405bb973ce SHA-256: e3a67f02a69f0015e17d2efc55a33518a3d94e26b6fdca1ad21ad377ebdc802f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'https://trafficel.ru/123?utm_term=albatross+around+neck+synonym', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://trafficel.ru/123?utm_term=albatross+around+neck+synonym PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5fd8212ed43bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5feb781cc625a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fa2e3a277bf9.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/roOqeih/crazy_taxi_game_free_download_for_windows_7.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/nisavopov.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/zotit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5fa8cfd2ed768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_5fc593ea2b50e.pdfIn PDF document text
    • https://cdn.sqhk.co/dumadomizore/Sghc7bv/moxusudekafuberi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fca411a676aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00015c45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15C45 18784 bytes
SHA-256: 00039d7d186988598b6423aa613b6643bc5bfd5cd9361d04520311e0c05b6f58
font_00_sfnt_off0000d516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 5564 bytes
SHA-256: 57fdf125e9c8403dca97be674f32496465616690f840846409cd7bbddfc5f959
font_01_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5380 bytes
SHA-256: 2f1f6f7705806400f7e4e50ae5b23445654d7a7c242a94929b30eabf7f68c99b
font_02_sfnt_off0000faca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 3384 bytes
SHA-256: b1ec714d6ccacd50aef89a6c13be5b31f27ff542b50c53350c866cc0cc6d1d19
font_03_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 2328 bytes
SHA-256: c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24
font_04_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 2108 bytes
SHA-256: 806d12f4c18e044784d20764d58024893796e88f204c306662924b3e907cbcac
font_05_sfnt_off00011c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 6064 bytes
SHA-256: 69f2a1138c7f31012adb6b9f0b73ec8db3c35a535aaea9f97e496fb3845d0a04
font_06_sfnt_off00012c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C21 15500 bytes
SHA-256: 480b7573433521a96d5eb2fcfb4b4bf801222eec1f0fd557f45f1869941217dd
font_08_sfnt_off00017a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A43 3992 bytes
SHA-256: cc8e04d85074f937be572fbe0f2ee651bf59ef0aca73b223a4e8b2a3e4369134

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