Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8dbfbf690f810c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-10 00:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f40819125d0ff2791e226ff88105d8e SHA-1: 87504371a3917ff54b107451fb1fc2048359b678 SHA-256: 2b8dbfbf690f810c0d4b87b2889f06aba75af32fa5817d7de4f749e76da5161e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=bogitora+2005+all+song PDF link annotation
    • http://lightly.store/pumabupavfucf.pdfIn PDF document text
    • http://repovor.22web.org/building_materials_industry_report.pdfIn PDF document text
    • https://balimalovi.weebly.com/uploads/1/3/2/7/132710770/9598492.pdfIn PDF document text
    • http://heartcenteredequestrian.com/wupizijcyq0l.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/681ea3042f7.pdfIn PDF document text
    • http://healthytrands.com/vales530x5.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/lukorezonijifebezaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejamezi.rf.gd/bratstvo_crnog_bodea_14.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/monster_hunter_illustrations_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/47791840586.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/62902305967.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/53929490774.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/about_us_webpage_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/dekepigitavikilaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/60762844559.pdfIn PDF document text
    • http://bidilud.rf.gd/dr_phil_website_personality_test.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/beautiful_landscape_pictures.pdfIn PDF document text
    • http://gejujebiwibi.epizy.com/pefekudaxodif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC77 4068 bytes
SHA-256: 2af67140674199a2f8472b19efa773d0d0a80149ec6d1c014876ee104d188837
font_01_sfnt_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 5300 bytes
SHA-256: 620f40aae51ff69f4cff8d486a8c3669ff5324e590cbeca4540ab3f8fc41798c
font_02_sfnt_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 10836 bytes
SHA-256: 59508d2b7b7368a429b6b1b942ef806fefb76701bab8c34ceda5fe1fb7ced048

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