Malicious PDF — malware analysis report

Static analysis result for SHA-256 2189c50ca3f668f3…

MALICIOUS

PDF

86.8 KB Created: 2021-03-29 03:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4e9c313e7fad503ab498d4952f6a6f78 SHA-1: 1a3b4df6782e5292b22ac8d5603d3a0363bae0b1 SHA-256: 2189c50ca3f668f386a1b8797647e5b7e7ab2f5c4580361bd4e6baf5f705a304
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URLs, https://zajinet.ru/strik?utm_term=hpi+savage+x+4.6+with+5.9+engine, is directly associated with the malicious verdict. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=hpi+savage+x+4.6+with+5.9+engine PDF link annotation
    • http://lastasked.com/367383217302unyc.pdfIn PDF document text
    • http://tesidakikize.iblogger.org/70070759319.pdfIn PDF document text
    • http://organic-ita.space/formulas_para_calcular_el_volumen_de_prismas_y_cilindroscfxvp.pdfIn PDF document text
    • http://bifovasux.22web.org/derecho_romano_vulgar_wikipedia.pdfIn PDF document text
    • http://airned.ru/how_to_solve_kinetic_and_potential_energy_problemsvs3qp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobunuwofapow.rf.gd/99038421681.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/biomedical_waste_management_amendment_rules_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/daily_oral_language_3rd_grade.pdfIn PDF document text
    • http://faxiwig.epizy.com/a_formal_letter_to_uk_embassy.pdfIn PDF document text
    • http://zojusis.rf.gd/fajenoxenudisinisukamagug.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_30ea428bcba94f23b6f1eac9c98972c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/treatment_guidelines_for_epididymitis.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/mubujokufajup.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/29367161833.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_485550de692d48d6abab665334119fae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pigolo/20438666558.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/cengel_heat_transfer_4th_edition.pdfIn PDF document text
    • http://wodasekewu.epizy.com/58929206361.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_cbb77342113f4eceb85bce4f9427b69a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/stonehenge_self_guided_tour.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_4a270748688642ceb8eac37fcab20eb1.pdf?index=trueIn 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_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 5688 bytes
SHA-256: ae67393f09e505a73776e20d87754bca36d7905fca54edda95ad9faa5ad7c3e6
font_01_sfnt_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 10984 bytes
SHA-256: 34a8f4092db7462eb0ce96ce6481d73793070ab2839e77ee3a3bf4fbb7894b47

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