Malicious PDF — malware analysis report

Static analysis result for SHA-256 759e83626986e61d…

MALICIOUS

PDF

102.9 KB Created: 2021-03-30 06:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52cff7a8d2e7e9a83c85301e47772144 SHA-1: 960921dbac804e4954af59c80842ec3145d33360 SHA-256: 759e83626986e61d8fd139a8bd02bbc0f16bde9fb764aa95a78d1dcc4065cba4
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of numerous external URLs, particularly the one identified by the PDF_URI heuristic, strongly suggests a phishing or malware distribution attempt, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://botokaw.ru/strik?utm_term=marsha+linehan+dbt+workbook+pdf
    • http://mon-cmso.best/44518641835mofd1.pdf
    • https://fuxexuwamonem.weebly.com/uploads/1/3/5/3/135387882/bikinumupozisodes.pdf
    • http://varistop.site/wusemexipetubepawuwap0vay.pdf
    • http://excschool.ru/sistema_muscular_humano_completozx5p5.pdf
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/6326904.pdf
    • http://evakuator-uga.ru/minonusasegutasoneejlst.pdf
    • http://teksalle.xyz/titanic_blame_crossword_answersdwpy8.pdf
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/95abc.pdf
    • http://qrastenmap.online/wiserezcirp.pdf
    • http://fuwiduwoxobol.mygamesonline.org/46352635396.pdf
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff185c77d8da.pdf
    • http://levantemosaic.com/nexamesd9of.pdf
    • https://cdn-cms.f-static.net/uploads/4505326/normal_600c110c1e1a9.pdf
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6009d250409cb.pdf
    • http://naturagrush.space/league_of_legends_stickman_hack_apkczr0s.pdf
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fdb10a81f0e7.pdf
    • https://static.s123-cdn-static.com/uploads/4394079/normal_5fe544a7cce81.pdf
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fc78d333333b.pdf
    • https://static.s123-cdn-static.com/uploads/4480897/normal_6003f62ec6b3f.pdf
    • http://tuxesimufimiti.mypressonline.com/dunijikoresefebidevubaz.pdf
    • https://cdn-cms.f-static.net/uploads/4403263/normal_602ce2f9472ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jatoxat.atwebpages.com/lajutuzizuletokofo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145ff.bin
a2b62086640e9084c05dbafeca59b373bf216c673e8b7bab9d42cf2a7dbede99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145FF 5216 bytes
font_01_sfnt_off000157ba.bin
bde319644b8b1e158cfa6e3785d8d1af542e01523ae2a117bbcbfc8e3c8310be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157BA 11120 bytes
font_02_sfnt_off00017dbc.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17DBC 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.