Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef30448774c01b0b…

MALICIOUS

PDF

89.2 KB Created: 2021-06-14 03:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e42011ae8556d13f1b770eb22bbd6f93 SHA-1: a833be9d1eea6167ad6d2b272cf10aaf4cf5744e SHA-256: ef30448774c01b0b380948302da1de5dfc256e5b2d6444baa73607f9fcd12251
156 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to reference a 'Charge 3 speaker manual', suggesting a lure to disguise malicious intent. The presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=charge+3+speaker+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418170/normal_60185c212a4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_6017bfa43a24a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_60bfee508aa00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fde3850b09f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_60c680d2a7bd7.pdfIn PDF document text
    • https://mawegovif.weebly.com/uploads/1/3/5/3/135319367/jikixuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_60148a7b245ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_6008fe05ecae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc7d852294e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_602fed8f92963.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/4543853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fe1530161dd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_60bcb237a3634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_603675e9e786d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5feef236d570b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_605effbb6d3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fce0c47c2e3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosegawibaso.pbworks.com/f/social_work_with_vulnerable_groups.pdfIn PDF document text
    • http://metudebebi.pbworks.com/f/rudolph_the_rednosed_lyrics.pdfIn PDF document text
    • http://fibonilavi.pbworks.com/w/file/fetch/144783504/macroeconomics_olivier_blanchard_7th_edition_pearson.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 5364 bytes
SHA-256: df4d44f5364a4062f0ef80a2528d20ab6c7bcad2a91fe347743ded6390ea6969
font_01_sfnt_off000102ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 4884 bytes
SHA-256: 1ac0662ee64e13b559275af79494deda547aa80db6135faf18ae1154b944ff4e
font_02_sfnt_off000113ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 12964 bytes
SHA-256: 9d7f584492abd7666d3e74d94dc95d552371765ec12583925e41701838be9fd1
font_03_sfnt_off00013e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E86 16664 bytes
SHA-256: b67703200f5152ef83bdc4258edbec52612382785aa997d58275e11c1ad503b6

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