Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59c3a594b16282f…

MALICIOUS

PDF

75.7 KB Created: 2021-02-20 06:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21394715f1ed897b320b0fee361fb403 SHA-1: 20651bd92512a165f913ca8f6ad3d961d848f620 SHA-256: f59c3a594b16282f9051ba584ffddffa468a2fd9c75c9d3ff826a969e244077d
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or a method to distribute further malicious content. The primary external URI, 'https://maypoin.ru/strik?utm_term=how+much+does+a+family+meal+cost+from+boston+market', is likely a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+much+does+a+family+meal+cost+from+boston+market PDF link annotation
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/5535288.pdfIn PDF document text
    • http://fuckfrsky.com/45379363979zm2de.pdfIn PDF document text
    • https://vesanawe.weebly.com/uploads/1/3/4/6/134602832/gogejederir.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/2ee9029c7127.pdfIn PDF document text
    • https://poduxerot.weebly.com/uploads/1/3/0/7/130776630/5232225.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/salade/16074063513.pdfIn PDF document text
    • http://fobajoruvibu.epizy.com/police_report_search_california.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/electron_energy_levels_worksheet_answer_key.pdfIn PDF document text
    • http://vorasokipat.rf.gd/cbre_cap_rate_report_q2_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/63378866806.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/toxicity_test_oecd_guidelines_ppt.pdfIn PDF document text
    • http://jekidosokun.epizy.com/69666852841.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/ansible_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/collective_nouns_worksheet_8th_grade.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_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 5620 bytes
SHA-256: d9e86dc57f43cc5db46574368b0ad27d8edf9505a0b3196fc7a75d256fa1bb33
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 10684 bytes
SHA-256: 6c94a60f565be5979d076337611011c5798f7b3f484f6c897a0fd0855c3777cb

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